update container port mapping

docker/acc-server/Dockerfile

@@ -1,6 +1,5 @@
 # ACC Server container: Wine + accServer.exe
-# Game files are mounted read-only from the shared acc-game volume.
-# Per-server config files are mounted read-write from the manager's config volume.
+# Game files are bind-mounted from the host at /acc/game.
 FROM debian:bookworm-slim
 
 # Install Wine, Xvfb (headless display for Wine), and minimal runtime deps.
@@ -12,6 +11,7 @@ RUN dpkg --add-architecture i386 && \
         wine64 \
         xvfb \
         ca-certificates \
+        tcpdump \
         && \
     rm -rf /var/lib/apt/lists/*
 
@@ -19,6 +19,10 @@ RUN mkdir -p /tmp/.X11-unix && chmod 1777 /tmp/.X11-unix
 
 WORKDIR /root
 
+ENV WINEARCH=win64
+ENV WINEPREFIX=/root/.wine
+ENV WINEDEBUG=-all
+
 # Copy entrypoint script.
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
@@ -26,11 +30,6 @@ RUN chmod +x /entrypoint.sh
 # Bind-mounted by DockerRuntime.Create: per-server game install (rw)
 VOLUME ["/acc/game"]
 
-# Default server port — overridden at runtime via SERVER_PORT env var.
 ENV SERVER_PORT=9600
-ENV WINEDEBUG=-all
-
-EXPOSE ${SERVER_PORT}/tcp
-EXPOSE ${SERVER_PORT}/udp
 
 ENTRYPOINT ["/entrypoint.sh"]