fix acc server container restarting

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