Add Docker deployment config and production CORS

- Dockerfile with multi-stage build (builder + production)
- docker-compose.yml for EC2 deployment with SSH localhost
- Add status.eventifyplus.com to CORS origins

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/index.ts

@@ -15,7 +15,7 @@ const app = express();
 // ── Middleware ──
 app.use(
   cors({
-    origin: ['http://localhost:5173', 'http://localhost:5174'],
+    origin: ['http://localhost:5173', 'http://localhost:5174', 'https://status.eventifyplus.com'],
     credentials: true,
   })
 );