Run container unprivileged by default using a macvlan

docs/compose-files/docker-compose.privileged.yml

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+---
+services:
+  steam-headless:
+    image: josh5/steam-headless:latest
+    restart: unless-stopped
+    runtime: ${DOCKER_RUNTIME}
+    ## NOTE: This config uses privileged to access to host to be able to access the required devices
+    privileged: true
+    shm_size: ${SHM_SIZE}
+    ipc: host # Could also be set to 'shareable'
+    ulimits:
+      nofile:
+        soft: 1024
+        hard: 524288
+
+    # NETWORK:
+    ## NOTE:  If we do not use the host network, then physical device input is not possible
+    ##        and your USB connected controllers will not work in steam games.
+    network_mode: host
+    hostname: ${NAME}
+    extra_hosts:
+      - "${NAME}:127.0.0.1"
+    
+    # ENVIRONMENT:
+    ## Read all config variables from the .env file
+    env_file: .env
+
+    # VOLUMES:
+    volumes:
+      # The location of your home directory.
+      - /opt/container-data/steam-headless/home/:/home/default/:rw
+
+      # The location where all games should be installed.
+      # This path needs to be set as a library path in Steam after logging in.
+      # Otherwise, Steam will store games in the home directory above.
+      - /mnt/games/:/mnt/games/:rw
+
+      # The Xorg socket. This will be shared with other containers so they can access the X server.
+      # Select only one option:
+      #   Option #1) Start a X server in the container to share with any other containers.
+      #- /opt/container-data/steam-headless/.X11-unix/:/tmp/.X11-unix/:rw
+      #   Option #2) Use an existing X server running on the host.
+      #- /tmp/.X11-unix/:/tmp/.X11-unix/:rw
+
+      # Pulse audio socket. This will be shared with other containers so they can access the audio sink.
+      # Leave commented out to not share the pulse socket with any other Docker containers.
+      #- /opt/container-data/steam-headless/pulse/:/tmp/pulse/:rw
+
+      # Input devices used for mouse and joypad support inside the container.
+      - /dev/input/:/dev/input/:ro
+
+      # Store flatpak var files in a volume.
+      - steam-headless-var-lib-flatpak:/var/lib/flatpak/:rw
+
+volumes:
+  steam-headless-var-lib-flatpak: