INITIAL

display-manager/Dockerfile

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+FROM debian:bullseye-slim
+
+RUN apt-get update && apt-get install -y \
+    sway \
+    xwayland \
+    dbus-x11 \
+    libwayland-client0 \
+    libwayland-server0 \
+    libwayland-egl1 \
+    mesa-vulkan-drivers \
+    libvulkan1 \
+    fonts-liberation \
+    x11-xserver-utils \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY sway.conf /etc/sway/config
+COPY start.sh /start.sh
+RUN chmod +x /start.sh
+
+# Need to run as root to access DRM devices on many kiosk setups
+USER root
+
+CMD ["/start.sh"]

display-manager/start.sh

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+#!/bin/bash
+
+# Ensure runtime directory exists
+mkdir -p /run/wayland
+chmod 0700 /run/wayland
+
+# Set env vars for Wayland/Sway
+export XDG_RUNTIME_DIR=/run/wayland
+export WAYLAND_DISPLAY=wayland-1
+export WLR_BACKENDS=drm,libinput
+# Fallback to headless if DRM is not available (useful for testing on mac/desktop without actual DRM)
+# export WLR_BACKENDS=headless
+
+# Run sway
+echo "Starting Sway..."
+exec sway -d -c /etc/sway/config

display-manager/sway.conf

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+# Default sway config for Kiosk
+
+# Disable default bar
+bar {
+    mode invisible
+}
+
+# Remove window borders and title bars
+default_border none
+default_floating_border none
+hide_edge_borders both
+
+# Map workspaces to specific outputs
+# Note: In a real Pi 4 environment, the outputs might be named HDMI-A-1 and HDMI-A-2.
+# You can customize these output names based on `swaymsg -t get_outputs`.
+workspace 1 output HDMI-A-1
+workspace 2 output HDMI-A-2
+
+# Set a black background
+output * bg #000000 solid_color
+
+# Idle configuration
+# We don't want the screen to turn off in a kiosk.
+exec swayidle -w \
+    timeout 3600 'swaymsg "output * dpms on"' \
+    resume 'swaymsg "output * dpms on"'
+
+# Include any other specific configurations
+include /etc/sway/config.d/*