fix acc server container restarting

docker/acc-server/Dockerfile

@@ -15,10 +15,9 @@ RUN dpkg --add-architecture i386 && \
         && \
     rm -rf /var/lib/apt/lists/*
 
-# Create a non-root user for running the server.
-RUN useradd -ms /bin/bash accserver
+RUN mkdir -p /tmp/.X11-unix && chmod 1777 /tmp/.X11-unix
 
-WORKDIR /home/accserver
+WORKDIR /root
 
 # Copy entrypoint script.
 COPY entrypoint.sh /entrypoint.sh
@@ -30,10 +29,8 @@ VOLUME ["/acc/game"]
 # Default server port — overridden at runtime via SERVER_PORT env var.
 ENV SERVER_PORT=9600
 ENV WINEDEBUG=-all
-ENV DISPLAY=:99
 
 EXPOSE ${SERVER_PORT}/tcp
 EXPOSE ${SERVER_PORT}/udp
 
-USER accserver
 ENTRYPOINT ["/entrypoint.sh"]

docker/acc-server/entrypoint.sh

@@ -1,7 +1,15 @@
 #!/bin/bash
 set -e
 
-Xvfb :99 -screen 0 1024x768x16 &
+# Use a display number derived from the server port to avoid conflicts
+# between containers (each server gets its own unique display).
+DISPLAY_NUM=$((SERVER_PORT % 1000 + 100))
+export DISPLAY=:${DISPLAY_NUM}
+
+# Clean up any stale X lock from a previous container run.
+rm -f /tmp/.X${DISPLAY_NUM}-lock /tmp/.X11-unix/X${DISPLAY_NUM} 2>/dev/null || true
+
+Xvfb ${DISPLAY} -screen 0 1024x768x16 -nolisten tcp &
 XVFB_PID=$!
 
 cleanup() {
@@ -10,7 +18,9 @@ cleanup() {
 }
 trap cleanup SIGTERM SIGINT
 
+mkdir -p /acc/game/log
+
 echo "Starting ACC server on port ${SERVER_PORT}..."
 
-exec wine /acc/game/accServer.exe \
-    -port "${SERVER_PORT}"
+cd /acc/game
+exec wine /acc/game/accServer.exe