Prepare application for production deployment with Docker and PostgreSQL

Integrate PostgreSQL database with Drizzle ORM, implement database migrations, and enhance Dockerfile for production build.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ceced2fc-aa46-458d-ba87-ddd4b7bb1518
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/659922a9-0087-461c-90dd-6d9a58b81d4d/ceced2fc-aa46-458d-ba87-ddd4b7bb1518/ahHWEFX

server/index.ts

@@ -1,7 +1,7 @@
 import express, { type Request, Response, NextFunction } from "express";
 import { registerRoutes } from "./routes";
 import { setupVite, serveStatic, log } from "./vite";
-import { initializeDatabase } from "./db";
+import { initializeDatabase, closeDatabase } from "./db";
 
 const app = express();
 app.use(express.json());
@@ -79,4 +79,23 @@ app.use((req, res, next) => {
   }, () => {
     log(`serving on port ${port}`);
   });
+
+  // Graceful shutdown
+  const gracefulShutdown = async (signal: string) => {
+    log(`${signal} received, closing server gracefully...`);
+    server.close(async () => {
+      log('HTTP server closed');
+      await closeDatabase();
+      process.exit(0);
+    });
+
+    // Force close after 30 seconds
+    setTimeout(() => {
+      console.error('Forced shutdown after timeout');
+      process.exit(1);
+    }, 30000);
+  };
+
+  process.on('SIGTERM', () => gracefulShutdown('SIGTERM'));
+  process.on('SIGINT', () => gracefulShutdown('SIGINT'));
 })();