add EXPOSE port in Dockerfile (#3523)

Dockerfile

@@ -49,6 +49,7 @@ RUN chmod +x \
   /usr/bin/x-ui
 
 ENV XUI_ENABLE_FAIL2BAN="true"
+EXPOSE 2053
 VOLUME [ "/etc/x-ui" ]
 CMD [ "./x-ui" ]
 ENTRYPOINT [ "/app/DockerEntrypoint.sh" ]