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Web accessible Steam inside a Debian Container

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# [linuxserver/steam](https://github.com/linuxserver/docker-steam)

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[Steam](https://store.steampowered.com/) is the ultimate destination for playing, discussing, and creating games.

[![steam](https://raw.githubusercontent.com/linuxserver/docker-templates/master/linuxserver.io/img/steam-logo.png)](https://store.steampowered.com/)

## Supported Architectures

We utilise the docker manifest for multi-platform awareness. More information is available from docker [here](https://distribution.github.io/distribution/spec/manifest-v2-2/#manifest-list) and our announcement [here](https://blog.linuxserver.io/2019/02/21/the-lsio-pipeline-project/).

Simply pulling `lscr.io/linuxserver/steam:latest` should retrieve the correct image for your arch, but you can also pull specific arch images via tags.

The architectures supported by this image are:

| Architecture | Available | Tag |
| :----: | :----: | ---- |
| x86-64 | ✅ | amd64-\<version tag\> |
| arm64 | ❌ | |

## Application Setup

The application can be accessed at:

* https://yourhost:3001/

>[!NOTE]
>This image is for a web accessible version of Steam to be played through a web browser it is in development and has oddities, if you want a fully flushed out Moonlight couch solution please consider [Wolf](https://games-on-whales.github.io/wolf/stable/user/quickstart.html) or another non Docker solution. Moonlight clients have major advantages over using a web browser.

## GPU Support

Using an Intel/AMD GPU is usually as easy as just passing `--device /dev/dri:/dev/dri`.
If you have multiple GPUs you need to pass both the setting for the render node and the encoder IE for the second GPU:

```
-e DRINODE=/dev/dri/renderD129 \
-e DRI_NODE=/dev/dri/renderD129
```

Nvidia support only works on 580 and up full proprietary drivers (no MIT/GPL) with `nvidia-drm.modeset=1` kernel parameter set. You must ensure the card is initialized before running a container so on headless systems run `nvidia-modprobe --modeset` from the host even with this kernel parameter set, this only needs to be run once per boot.

These modifications for NVIDIA are for Wayland to function properly and have nothing to do with the Docker runtime. If you are using compose it is important to run `sudo nvidia-ctk runtime configure --runtime=docker` this is a persistent setting and only needs to run once.

## Gamepad support

This container leverages a userspace gamepad interposer to provide gamepad support. To use a gamepad always force Proton in "Properties>Compatibility" even for Linux native games, "Proton Hotfix" is a good default selection. You cannot use the "Steam Input" feature on any game as the uinput socket and HID do not exist.

## Gaming mode

An absolute must for mouse and keyboard input is sending relative mouse input from the browser, you will need to use the "Gaming Mode" which is a small crosshair in the top right of the sidebar. This runs in fullscreen and traps you in the window, to exit this mode hold down escape for 3 seconds.

## Game Launching

Included in this image are tools for managing [Proton versions](https://davidotek.github.io/protonup-qt/) and a [command line launcher](https://github.com/Open-Wine-Components/umu-launcher). This means once a game or application is installed via Steam it can be directly launched on init by creating a config file and modifying `/config/.config/labwc/autostart` to run `umu-run` instead of Steam.:

```
umu-run --config /config/game.toml
```

```toml
[umu]
prefix = "/config/game"
exe = "/config/Desktop/game/game.exe"
proton = "/config/.local/share/Steam/compatibilitytools.d/GE-Proton-version"
game_id = "0"
```

This facilitates custom home directories with pre-configured runtimes and gamefiles for baking images outside of using the Steam launcher.

### Strict reverse proxies

This image uses a self-signed certificate by default. This naturally means the scheme is `https`.
If you are using a reverse proxy which validates certificates, you need to [disable this check for the container](https://docs.linuxserver.io/faq#strict-proxy).

**Modern GUI desktop apps may have compatibility issues with the latest Docker syscall restrictions. You can use Docker with the `--security-opt seccomp=unconfined` setting to allow these syscalls on hosts with older Kernels or libseccomp versions.**

### Security

>[!WARNING]
>This container provides privileged access to the host system. Do not expose it to the Internet unless you have secured it properly.

**HTTPS is required for full functionality.** Modern browser features such as WebCodecs, used for video and audio, will not function over an insecure HTTP connection.

By default, this container has no authentication. The optional `CUSTOM_USER` and `PASSWORD` environment variables enable basic HTTP auth, which is suitable only for securing the container on a trusted local network. For internet exposure, we strongly recommend placing the container behind a reverse proxy, such as [SWAG](https://github.com/linuxserver/docker-swag), with a robust authentication mechanism.

The web interface includes a terminal with passwordless `sudo` access. Any user with access to the GUI can gain root control within the container, install arbitrary software, and probe your local network.

While not generally recommended, certain legacy environments specifically those with older hardware or outdated Linux distributions may require the deactivation of the standard seccomp profile to get containerized desktop software to run. This can be achieved by utilizing the `--security-opt seccomp=unconfined` parameter. It is critical to use this option only when absolutely necessary as it disables a key security layer of Docker, elevating the potential for container escape vulnerabilities.

### FullColor 4:4:4 Encoding

If you notice blurry text, particularly light text on a black background, you can send true 8-bit color to the browser by enabling the **FullColor 4:4:4** encoding in the sidebar, or by using the jpeg encoding mode.

**Note on Hardware Acceleration:** Currently, only Nvidia GPUs support encoding this color profile in **Zero Copy** mode. If FullColor 4:4:4 is enabled on Intel or AMD GPUs, the system will fall back to CPU encoding. This forces the CPU to read the pixels back from the GPU, which will cause a significant decrease in performance.

### Hardware Acceleration & Wayland

We have transitioned our desktop containers from X11 to a modern Wayland stack, which is now the default.

**Hardware Fallback Note:** On `x86_64` architecture, the Wayland stack requires a processor with AVX2 support (Intel Haswell generation or newer). If your processor lacks AVX2 (such as older CPUs or certain low-end Celerons), the container will automatically fall back to X11.

**Important:** GPU acceleration support for X11 is deprecated. Future development for hardware acceleration is focused entirely on the Wayland stack.

If you experience compatibility issues and need to manually disable Wayland (forcing a fallback to X11), you can do so by setting the following environment variable:

* `-e PIXELFLUX_WAYLAND=false`

**Why Wayland?**

* **Zero Copy Encoding:** When configured correctly with a GPU, the frame is rendered and encoded on the video card without ever being copied to the system RAM. This drastically lowers CPU usage and latency.
* **Modern Stack:** Single-application containers utilize **Labwc** (replacing Openbox) and full desktop containers use **KDE Plasma Wayland**, providing a more modern, performant, and secure compositing environment while retaining the same user experience.

#### GPU Configuration

To use hardware acceleration in Wayland mode, we distinguish between the card used for **Rendering** (3D apps/Desktops) and **Encoding** (Video Stream).

**Configuration Variables:**

* `DRINODE`: The path to the GPU used for **Rendering** (EGL).
* `DRI_NODE`: The path to the GPU used for **Encoding** (VAAPI/NVENC).

If both variables point to the same device, the container will automatically enable **Zero Copy** encoding, significantly reducing CPU usage and latency. If they are set to different devices one will be used for **Rendering** and one for **Encoding** with a cpu readback.

You can also use the environment variable `AUTO_GPU=true`, with this set the first card detected in the container (IE `/dev/dri/renderD128`) will be used and configured for **Zero Copy**.

##### Intel & AMD (Open Source Drivers)

For Intel and AMD GPUs.

```yaml
    devices:
      - /dev/dri:/dev/dri
    environment:
      - PIXELFLUX_WAYLAND=true
      # Optional: Specify device if multiple exist (IE: /dev/dri/renderD129)
      - DRINODE=/dev/dri/renderD128
      - DRI_NODE=/dev/dri/renderD128
```

##### Nvidia (Proprietary Drivers)

**Note: Nvidia support is not available for Alpine-based images.**

**Prerequisites:**

1. **Driver:** Proprietary drivers **580 or higher** are required. **Crucially, you should install the driver using the `.run` file downloaded directly from the Nvidia website.**
    * **Unraid:** Use the production branch from the Nvidia Driver Plugin.

2. **Kernel Parameter:** You must set `nvidia-drm.modeset=1 nvidia_drm.fbdev=1` in your host bootloader.
    * **Standard Linux (GRUB):** Edit `/etc/default/grub` and add the parameter to your existing `GRUB_CMDLINE_LINUX_DEFAULT` line:

```text
        GRUB_CMDLINE_LINUX_DEFAULT="<other existing options> nvidia-drm.modeset=1 nvidia_drm.fbdev=1"
        ```

Then apply the changes by running:

```bash
        sudo update-grub
        ```

* **Unraid (Syslinux):** Edit the file `/boot/syslinux/syslinux.cfg` and add `nvidia-drm.modeset=1 nvidia_drm.fbdev=1` to the end of the `append` line for the Unraid OS boot entry.

3. **Hardware Initialization:** **On headless systems, the Nvidia video card requires a physical dummy plug inserted into the GPU so that DRM initializes properly.**

4. **Docker Runtime:** Configure the host docker daemon to use the Nvidia runtime:

```bash
    sudo nvidia-ctk runtime configure --runtime=docker
    sudo systemctl restart docker
    ```

**Compose Configuration:**

```yaml
---
services:
  steam:
    image: lscr.io/linuxserver/steam:latest
    environment:
      - PIXELFLUX_WAYLAND=true
      # Ensure these point to the rendered node injected by the runtime (usually renderD128)
      - DRINODE=/dev/dri/renderD128
      - DRI_NODE=/dev/dri/renderD128
    deploy:
      resources:
        reservations:
          devices:
            - driver: nvidia
              count: 1
              capabilities: [compute,video,graphics,utility]
```

* **Unraid:** Ensure you're properly setting the DRINODE/DRI_NODE and adding `--gpus all --runtime nvidia` to your extra parameters.

### SealSkin Compatibility

This container is compatible with [SealSkin](https://sealskin.app).

SealSkin is a self-hosted, client-server platform that provides secure authentication and collaboration features while using a browser extension to intercept user actions such as clicking a link or downloading a file and redirect them to a secure, isolated application environment running on a remote server.

* **SealSkin Server:** [Get it Here](https://github.com/linuxserver/docker-sealskin)
* **Browser Extension:** [Chrome](https://chromewebstore.google.com/detail/sealskin-isolation/lclgfmnljgacfdpmmmjmfpdelndbbfhk) and [Firefox](https://addons.mozilla.org/en-US/firefox/addon/sealskin-isolation/).
* **Mobile App:** [iOS](https://apps.apple.com/us/app/sealskin/id6758210210) and [Android](https://play.google.com/store/apps/details?id=io.linuxserver.sealskin)

### Options in all Selkies-based GUI containers

This container is based on [Docker Baseimage Selkies](https://github.com/linuxserver/docker-baseimage-selkies).

<details>
<summary>Click to expand: Optional Environment Variables</summary>

| Variable | Description |
| :----: | --- |
| PIXELFLUX_WAYLAND | If set to true the container will initialize in Wayland mode running [Smithay](https://github.com/Smithay/smithay) and Labwc while enabling zero copy encoding with a GPU |
| SELKIES_DESKTOP | If set to true and in Wayland mode, a simple panel will be initialized with labwc |
| CUSTOM_PORT | Internal port the container listens on for http if it needs to be swapped from the default `3000` |
| CUSTOM_HTTPS_PORT | Internal port the container listens on for https if it needs to be swapped from the default `3001` |
| CUSTOM_WS_PORT | Internal port the container listens on for websockets if it needs to be swapped from the default 8082 |
| CUSTOM_USER | HTTP Basic auth username, abc is default. |
| DRI_NODE | **Encoding GPU**: Enable VAAPI/NVENC stream encoding and use the specified device IE `/dev/dri/renderD128` |
| DRINODE | **Rendering GPU**: Specify which GPU to use for EGL/3D acceleration IE `/dev/dri/renderD129` |
| AUTO_GPU | If set to true and in Wayland mode, we will automatically use the first GPU available for encoding and rendering IE `/dev/dri/renderD128` |
| PASSWORD | HTTP Basic auth password, abc is default. If unset there will be no auth |
| SUBFOLDER | Subfolder for the application if running a subfolder reverse proxy, need both slashes IE `/subfolder/` |
| TITLE | The page title displayed on the web browser, default "Selkies" |
| DASHBOARD | Allows the user to set their dashboard. Options: `selkies-dashboard`, `selkies-dashboard-zinc`, `selkies-dashboard-wish` |
| FILE_MANAGER_PATH | Modifies the default upload/download file path, path must have proper permissions for abc user |
| START_DOCKER | If set to false a container with privilege will not automatically start the DinD Docker setup |
| DISABLE_IPV6 | If set to true or any value this will disable IPv6 |
| LC_ALL | Set the Language for the container to run as IE `fr_FR.UTF-8` `ar_AE.UTF-8` |
| NO_DECOR | If set the application will run without window borders for use as a PWA. (Decor can be enabled and disabled with Ctrl+Shift+d) |
| NO_FULL | Do not autmatically fullscreen applications when using openbox. |
| NO_GAMEPAD | Disable userspace gamepad interposer injection. |
| DISABLE_ZINK | Do not set the Zink environment variables if a video card is detected (userspace applications will use CPU rendering) |
| DISABLE_DRI3 | Do not use DRI3 acceleration if a video card is detected (userspace applications will use CPU rendering) |
| MAX_RES | Pass a larger maximum resolution for the container default is 16k `15360x8640` |
| WATERMARK_PNG | Full path inside the container to a watermark png IE `/usr/share/selkies/www/icon.png` |
| WATERMARK_LOCATION | Where to paint the image over the stream integer options below |

**`WATERMARK_LOCATION` Options:**

* **1**: Top Left
* **2**: Top Right
* **3**: Bottom Left
* **4**: Bottom Right
* **5**: Centered
* **6**: Animated

</details>

<details>
<summary>Click to expand: Optional Run Configurations (DinD & GPU Mounts)</summary>

| Argument | Description |
| :----: | --- |
| `--privileged` | Starts a Docker-in-Docker (DinD) environment. For better performance, mount the Docker data directory from the host, e.g., `-v /path/to/docker-data:/var/lib/docker`. |
| `-v /var/run/docker.sock:/var/run/docker.sock` | Mounts the host's Docker socket to manage host containers from within this container. |
| `--device /dev/dri:/dev/dri` | Mount a GPU into the container, this can be used in conjunction with the `DRINODE` environment variable to leverage a host video card for GPU accelerated applications. |

</details>

<details>
<summary>Click to expand: Legacy X11 Resolution & Acceleration</summary>

**Note:** This section applies only if you are **NOT** using `PIXELFLUX_WAYLAND=true`.

When using 3d acceleration via Nvidia DRM or DRI3 in X11 mode, it is important to clamp the virtual display to a reasonable max resolution to avoid memory exhaustion or poor performance.

* `-e MAX_RES=3840x2160`

This will set the total virtual framebuffer to 4K. By default, the virtual monitor is 16K. If you have performance issues in an accelerated X11 session, try clamping the resolution to 1080p and work up from there:

```bash
-e SELKIES_MANUAL_WIDTH=1920
-e SELKIES_MANUAL_HEIGHT=1080
-e MAX_RES=1920x1080
```

</details>

### Language Support - Internationalization

To launch the desktop session in a different language, set the `LC_ALL` environment variable. For example:

* `-e LC_ALL=zh_CN.UTF-8` - Chinese
* `-e LC_ALL=ja_JP.UTF-8` - Japanese
* `-e LC_ALL=ko_KR.UTF-8` - Korean
* `-e LC_ALL=ar_AE.UTF-8` - Arabic
* `-e LC_ALL=ru_RU.UTF-8` - Russian
* `-e LC_ALL=es_MX.UTF-8` - Spanish (Latin America)
* `-e LC_ALL=de_DE.UTF-8` - German
* `-e LC_ALL=fr_FR.UTF-8` - French
* `-e LC_ALL=nl_NL.UTF-8` - Netherlands
* `-e LC_ALL=it_IT.UTF-8` - Italian

### Application Management

There are two methods for installing applications inside the container: PRoot Apps (recommended for persistence) and Native Apps.

#### PRoot Apps (Persistent)

Natively installed packages (e.g., via `apt-get install`) will not persist if the container is recreated. To retain applications and their settings across container updates, we recommend using [proot-apps](https://github.com/linuxserver/proot-apps). These are portable applications installed to the user's persistent `$HOME` directory.

To install an application, use the command line inside the container:

```bash
proot-apps install filezilla
```

A list of supported applications is available [here](https://github.com/linuxserver/proot-apps?tab=readme-ov-file#supported-apps).

#### Native Apps (Non-Persistent)

You can install packages from the system's native repository using the [universal-package-install](https://github.com/linuxserver/docker-mods/tree/universal-package-install) mod. This method will increase the container's start time and is not persistent. Add the following to your `compose.yaml`:

```yaml
  environment:
    - DOCKER_MODS=linuxserver/mods:universal-package-install
    - INSTALL_PACKAGES=libfuse2|git|gdb
```

### Advanced Configuration

<details>
<summary>Click to expand: Hardening Options</summary>

These variables can be used to lock down the desktop environment for single-application use cases or to restrict user capabilities.

| Variable | Description |
| :----: | --- |
| **`HARDEN_DESKTOP`** | Enables `DISABLE_OPEN_TOOLS`, `DISABLE_SUDO`, and `DISABLE_TERMINALS`. Also sets related Selkies UI settings (`SELKIES_FILE_TRANSFERS`, `SELKIES_COMMAND_ENABLED`, `SELKIES_UI_SIDEBAR_SHOW_FILES`, `SELKIES_UI_SIDEBAR_SHOW_APPS`) if they are not explicitly set by the user. |
| **`HARDEN_OPENBOX`** | Enables `DISABLE_CLOSE_BUTTON`, `DISABLE_MOUSE_BUTTONS`, and `HARDEN_KEYBINDS`. It also flags `RESTART_APP` if not set by the user, ensuring the primary application is automatically restarted if closed. |

**Individual Hardening Variables:**

| Variable | Description |
| :--- | --- |
| **`DISABLE_OPEN_TOOLS`** | If true, disables `xdg-open` and `exo-open` binaries by removing their execute permissions. |
| **`DISABLE_SUDO`** | If true, disables the `sudo` command by removing its execute permissions and invalidating the passwordless sudo configuration. |
| **`DISABLE_TERMINALS`** | If true, disables common terminal emulators by removing their execute permissions and hiding them from the Openbox right-click menu. |
| **`DISABLE_CLOSE_BUTTON`** | If true, removes the close button from window title bars in the Openbox window manager. |
| **`DISABLE_MOUSE_BUTTONS`** | If true, disables the right-click and middle-click context menus and actions within the Openbox window manager. |
| **`HARDEN_KEYBINDS`** | If true, disables default Openbox keybinds that can bypass other hardening options (e.g., `Alt+F4` to close windows, `Alt+Escape` to show the root menu). |
| **`RESTART_APP`** | If true, enables a watchdog service that automatically restarts the main application if it is closed. The user's autostart script is made read-only and root owned to prevent tampering. |

</details>

<details>
<summary>Click to expand: Selkies Application Settings</summary>

Using environment variables every facet of the application can be configured.

**Booleans and Locking:**
Boolean settings accept `true` or `false`. You can also prevent the user from changing a boolean setting in the UI by appending `|locked`.

* Example: `-e SELKIES_USE_CPU="true|locked"`

**Enums and Lists:**
These settings accept a comma-separated list of values. The first item becomes default. If only one item is provided, the UI dropdown is hidden.

* Example: `-e SELKIES_ENCODER="jpeg"`

**Ranges:**
Use a hyphen-separated `min-max` format for a slider, or a single number to lock the value.

* Example: `-e SELKIES_FRAMERATE="60"`

**Manual Resolution Mode:**
If `SELKIES_MANUAL_WIDTH` or `SELKIES_MANUAL_HEIGHT` are set, the resolution is locked to those values.

| Environment Variable | Default Value | Description |
| --- | --- | --- |
| `SELKIES_UI_TITLE` | `'Selkies'` | Title in top left corner of sidebar. |
| `SELKIES_UI_SHOW_LOGO` | `True` | Show the Selkies logo in the sidebar. |
| `SELKIES_UI_SHOW_SIDEBAR` | `True` | Show the main sidebar UI. |
| `SELKIES_UI_SHOW_CORE_BUTTONS` | `True` | Show the core components buttons display, audio, microphone, and gamepad. |
| `SELKIES_UI_SIDEBAR_SHOW_VIDEO_SETTINGS` | `True` | Show the video settings section in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_SCREEN_SETTINGS` | `True` | Show the screen settings section in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_AUDIO_SETTINGS` | `True` | Show the audio settings section in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_STATS` | `True` | Show the stats section in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_CLIPBOARD` | `True` | Show the clipboard section in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_FILES` | `True` | Show the file transfer section in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_APPS` | `True` | Show the applications section in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_SHARING` | `True` | Show the sharing section in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_GAMEPADS` | `True` | Show the gamepads section in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_FULLSCREEN` | `True` | Show the fullscreen button in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_GAMING_MODE` | `True` | Show the gaming mode button in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_TRACKPAD` | `True` | Show the virtual trackpad button in the sidebar. |
| `SELKIES_UI_SIDEBAR_SHOW_KEYBOARD_BUTTON` | `True` | Show the on-screen keyboard button in the display area. |
| `SELKIES_UI_SIDEBAR_SHOW_SOFT_BUTTONS` | `True` | Show the soft buttons section in the sidebar. |
| `SELKIES_AUDIO_ENABLED` | `True` | Enable server-to-client audio streaming. |
| `SELKIES_MICROPHONE_ENABLED` | `True` | Enable client-to-server microphone forwarding. |
| `SELKIES_GAMEPAD_ENABLED` | `True` | Enable gamepad support. |
| `SELKIES_CLIPBOARD_ENABLED` | `True` | Enable clipboard synchronization. |
| `SELKIES_COMMAND_ENABLED` | `True` | Enable parsing of command websocket messages. |
| `SELKIES_FILE_TRANSFERS` | `'upload,download'` | Allowed file transfer directions (comma-separated: "upload,download"). Set to "" or "none" to disable. |
| `SELKIES_ENCODER` | `'x264enc,x264enc-striped,jpeg'` | The default video encoders. |
| `SELKIES_FRAMERATE` | `'8-120'` | Allowed framerate range or a fixed value. |
| `SELKIES_H264_CRF` | `'5-50'` | Allowed H.264 CRF range or a fixed value. |
| `SELKIES_JPEG_QUALITY` | `'1-100'` | Allowed JPEG quality range or a fixed value. |
| `SELKIES_H264_FULLCOLOR` | `False` | Enable H.264 full color range for pixelflux encoders. |
| `SELKIES_H264_STREAMING_MODE` | `False` | Enable H.264 streaming mode for pixelflux encoders. |
| `SELKIES_USE_CPU` | `False` | Force CPU-based encoding for pixelflux. |
| `SELKIES_USE_PAINT_OVER_QUALITY` | `True` | Enable high-quality paint-over for static scenes. |
| `SELKIES_PAINT_OVER_JPEG_QUALITY` | `'1-100'` | Allowed JPEG paint-over quality range or a fixed value. |
| `SELKIES_H264_PAINTOVER_CRF` | `'5-50'` | Allowed H.264 paint-over CRF range or a fixed value. |
| `SELKIES_H264_PAINTOVER_BURST_FRAMES` | `'1-30'` | Allowed H.264 paint-over burst frames range or a fixed value. |
| `SELKIES_SECOND_SCREEN` | `True` | Enable support for a second monitor/display. |
| `SELKIES_AUDIO_BITRATE` | `'320000'` | The default audio bitrate. |
| `SELKIES_IS_MANUAL_RESOLUTION_MODE` | `False` | Lock the resolution to the manual width/height values. |
| `SELKIES_MANUAL_WIDTH` | `0` | Lock width to a fixed value. Setting this forces manual resolution mode. |
| `SELKIES_MANUAL_HEIGHT` | `0` | Lock height to a fixed value. Setting this forces manual resolution mode. |
| `SELKIES_SCALING_DPI` | `'96'` | The default DPI for UI scaling. |
| `SELKIES_ENABLE_BINARY_CLIPBOARD` | `False` | Allow binary data on the clipboard. |
| `SELKIES_USE_BROWSER_CURSORS` | `False` | Use browser CSS cursors instead of rendering to canvas. |
| `SELKIES_USE_CSS_SCALING` | `False` | HiDPI when false, if true a lower resolution is sent from the client and the canvas is stretched. |
| `SELKIES_PORT` (or `CUSTOM_WS_PORT`) | `8082` | Port for the data websocket server. |
| `SELKIES_DRI_NODE` (or `DRI_NODE`) | `''` | Path to the DRI render node for VA-API. |
| `SELKIES_AUDIO_DEVICE_NAME` | `'output.monitor'` | Audio device name for pcmflux capture. |
| `SELKIES_WATERMARK_PATH` (or `WATERMARK_PNG`) | `''` | Absolute path to the watermark PNG file. |
| `SELKIES_WATERMARK_LOCATION` (or `WATERMARK_LOCATION`) | `-1` | Watermark location enum (0-6). |
| `SELKIES_DEBUG` | `False` | Enable debug logging. |
| `SELKIES_ENABLE_SHARING` | `True` | Master toggle for all sharing features. |
| `SELKIES_ENABLE_COLLAB` | `True` | Enable collaborative (read-write) sharing link. |
| `SELKIES_ENABLE_SHARED` | `True` | Enable view-only sharing links. |
| `SELKIES_ENABLE_PLAYER2` | `True` | Enable sharing link for gamepad player 2. |
| `SELKIES_ENABLE_PLAYER3` | `True` | Enable sharing link for gamepad player 3. |
| `SELKIES_ENABLE_PLAYER4` | `True` | Enable sharing link for gamepad player 4. |

</details>

## Usage

To help you get started creating a container from this image you can either use docker-compose or the docker cli.

>[!NOTE]
>Unless a parameter is flagged as 'optional', it is *mandatory* and a value must be provided.

### docker-compose (recommended, [click here for more info](https://docs.linuxserver.io/general/docker-compose))

```yaml
---
services:
  steam:
    image: lscr.io/linuxserver/steam:latest
    container_name: steam
    security_opt:
      - seccomp:unconfined
      - apparmor:unconfined #optional
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Etc/UTC
    volumes:
      - /path/to/config:/config
    ports:
      - 3000:3000
      - 3001:3001
    shm_size: "1gb"
    restart: unless-stopped
```

### docker cli ([click here for more info](https://docs.docker.com/engine/reference/commandline/cli/))

```bash
docker run -d \
  --name=steam \
  --security-opt seccomp=unconfined \
  --security-opt apparmor=unconfined `#optional` \
  -e PUID=1000 \
  -e PGID=1000 \
  -e TZ=Etc/UTC \
  -p 3000:3000 \
  -p 3001:3001 \
  -v /path/to/config:/config \
  --shm-size="1gb" \
  --restart unless-stopped \
  lscr.io/linuxserver/steam:latest
```

## Parameters

Containers are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate `<external>:<internal>` respectively. For example, `-p 8080:80` would expose port `80` from inside the container to be accessible from the host's IP on port `8080` outside the container.

| Parameter | Function |
| :----: | --- |
| `-p 3000:3000` | Steam desktop gui HTTP must be proxied. |
| `-p 3001:3001` | Steam desktop gui HTTPS. |
| `-e PUID=1000` | for UserID - see below for explanation |
| `-e PGID=1000` | for GroupID - see below for explanation |
| `-e TZ=Etc/UTC` | specify a timezone to use, see this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List). |
| `-v /config` | Users home directory in the container, stores all files and games. |
| `--shm-size=` | Recommended for all desktop images. |
| `--security-opt seccomp=unconfined` | This is needed to allow bwrap to use namespacing for games. |
| `--security-opt apparmor=unconfined` | For Debian/Ubuntu hosts Steam needs elevated perms that AppArmor blocks. |

## Environment variables from files (Docker secrets)

You can set any environment variable from a file by using a special prepend `FILE__`.

As an example:

```bash
-e FILE__MYVAR=/run/secrets/mysecretvariable
```

Will set the environment variable `MYVAR` based on the contents of the `/run/secrets/mysecretvariable` file.

## Umask for running applications

For all of our images we provide the ability to override the default umask settings for services started within the containers using the optional `-e UMASK=022` setting.
Keep in mind umask is not chmod it subtracts from permissions based on it's value it does not add. Please read up [here](https://en.wikipedia.org/wiki/Umask) before asking for support.

## User / Group Identifiers

When using volumes (`-v` flags), permissions issues can arise between the host OS and the container, we avoid this issue by allowing you to specify the user `PUID` and group `PGID`.

Ensure any volume directories on the host are owned by the same user you specify and any permissions issues will vanish like magic.

In this instance `PUID=1000` and `PGID=1000`, to find yours use `id your_user` as below:

```bash
id your_user
```

Example output:

```text
uid=1000(your_user) gid=1000(your_user) groups=1000(your_user)
```

## Docker Mods

[![Docker Mods](https://img.shields.io/badge/dynamic/yaml?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=steam&query=%24.mods%5B%27steam%27%5D.mod_count&url=https%3A%2F%2Fraw.githubusercontent.com%2Flinuxserver%2Fdocker-mods%2Fmaster%2Fmod-list.yml)](https://mods.linuxserver.io/?mod=steam "view available mods for this container.") [![Docker Universal Mods](https://img.shields.io/badge/dynamic/yaml?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=universal&query=%24.mods%5B%27universal%27%5D.mod_count&url=https%3A%2F%2Fraw.githubusercontent.com%2Flinuxserver%2Fdocker-mods%2Fmaster%2Fmod-list.yml)](https://mods.linuxserver.io/?mod=universal "view available universal mods.")

We publish various [Docker Mods](https://github.com/linuxserver/docker-mods) to enable additional functionality within the containers. The list of Mods available for this image (if any) as well as universal mods that can be applied to any one of our images can be accessed via the dynamic badges above.

## Support Info

* Shell access whilst the container is running:

```bash
    docker exec -it steam /bin/bash
    ```

* To monitor the logs of the container in realtime:

```bash
    docker logs -f steam
    ```

* Container version number:

```bash
    docker inspect -f '{{ index .Config.Labels "build_version" }}' steam
    ```

* Image version number:

```bash
    docker inspect -f '{{ index .Config.Labels "build_version" }}' lscr.io/linuxserver/steam:latest
    ```

## Updating Info

Most of our images are static, versioned, and require an image update and container recreation to update the app inside. With some exceptions (noted in the relevant readme.md), we do not recommend or support updating apps inside the container. Please consult the [Application Setup](#application-setup) section above to see if it is recommended for the image.

Below are the instructions for updating containers:

### Via Docker Compose

* Update images:
    * All images:

```bash
        docker-compose pull
        ```

* Single image:

```bash
        docker-compose pull steam
        ```

* Update containers:
    * All containers:

```bash
        docker-compose up -d
        ```

* Single container:

```bash
        docker-compose up -d steam
        ```

* You can also remove the old dangling images:

```bash
    docker image prune
    ```

### Via Docker Run

* Update the image:

```bash
    docker pull lscr.io/linuxserver/steam:latest
    ```

* Stop the running container:

```bash
    docker stop steam
    ```

* Delete the container:

```bash
    docker rm steam
    ```

* Recreate a new container with the same docker run parameters as instructed above (if mapped correctly to a host folder, your `/config` folder and settings will be preserved)
* You can also remove the old dangling images:

```bash
    docker image prune
    ```

### Image Update Notifications - Diun (Docker Image Update Notifier)

>[!TIP]
>We recommend [Diun](https://crazymax.dev/diun/) for update notifications. Other tools that automatically update containers unattended are not recommended or supported.

## Building locally

If you want to make local modifications to these images for development purposes or just to customize the logic:

```bash
git clone https://github.com/linuxserver/docker-steam.git
cd docker-steam
docker build \
  --no-cache \
  --pull \
  -t lscr.io/linuxserver/steam:latest .
```

The ARM variants can be built on x86_64 hardware and vice versa using `lscr.io/linuxserver/qemu-static`

```bash
docker run --rm --privileged lscr.io/linuxserver/qemu-static --reset
```

Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64`.

## Versions

* **04.02.26:** - Add ProtonUp Qt for runtime management and umu-run for custom auto game launching.
* **17.01.26:** - Document Nvidia support.
* **09.01.26:** - Initial Version.

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