feat: wire graceful shutdown for shard connections on SIGTERM/SIGINT

Made-with: Cursor

backend/server.js

@@ -4,6 +4,7 @@ const http = require('http');
 const cors = require('cors');
 const { bootstrapGames } = require('./bootstrap');
 const { WebSocketManager, setWebSocketManager } = require('./utils/websocket-manager');
+const { cleanupAllShards } = require('./utils/ecast-shard-client');
 
 const app = express();
 const PORT = process.env.PORT || 5000;
@@ -53,6 +54,15 @@ if (require.main === module) {
     console.log(`Server is running on port ${PORT}`);
     console.log(`WebSocket server available at ws://localhost:${PORT}/api/sessions/live`);
   });
+
+  const shutdown = async () => {
+    console.log('Shutting down gracefully...');
+    await cleanupAllShards();
+    server.close(() => process.exit(0));
+  };
+
+  process.on('SIGTERM', shutdown);
+  process.on('SIGINT', shutdown);
 }
 
 module.exports = { app, server };