fix: wine too much clients errors

docker/acc-server/Dockerfile

@@ -13,12 +13,10 @@ RUN dpkg --add-architecture i386 && \
     apt-get update && \
     apt-get install -y --install-recommends \
         winehq-staging \
-        xvfb \
         tcpdump \
         && \
     rm -rf /var/lib/apt/lists/*
 
-RUN mkdir -p /tmp/.X11-unix && chmod 1777 /tmp/.X11-unix
 
 WORKDIR /root
 

docker/acc-server/entrypoint.sh

@@ -1,28 +1,20 @@
 #!/bin/bash
 set -e
 
-# 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}
-
 # Wine Staging looks for PulseAudio via XDG_RUNTIME_DIR. There is no audio
 # in this container, so point it at a valid (empty) directory to silence
 # the "XDG_RUNTIME_DIR is invalid" errors.
 export XDG_RUNTIME_DIR=/tmp/runtime-${SERVER_PORT}
 mkdir -p "${XDG_RUNTIME_DIR}"
 
-# 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
-
-# Raise Xvfb's client limit — Wine Staging opens more X11 connections than
-# the default 256, causing "Maximum number of clients reached" spam.
-Xvfb ${DISPLAY} -screen 0 1024x768x16 -nolisten tcp -maxclients 512 &
-XVFB_PID=$!
+# Use Wine's headless (null) display driver — accServer.exe has no GUI so
+# there is no need for Xvfb at all. This avoids the X11 client limit and
+# removes the Xvfb process entirely.
+export DISPLAY=
+export WINEDLLOVERRIDES="winex11.drv="
 
 cleanup() {
     echo "Stopping ACC server..."
-    kill $XVFB_PID 2>/dev/null || true
 }
 trap cleanup SIGTERM SIGINT