fix: wrap top-level await in main() for CommonJS compatibility

backend/src/index.ts

@@ -5,7 +5,6 @@ import fastifyWebSocket from '@fastify/websocket';
 import fastifyMultipart from '@fastify/multipart';
 import fastifyStatic from '@fastify/static';
 import webpush from 'web-push';
-import path from 'path';
 import { initDB } from './db.js';
 import { setupWebSocket } from './ws.js';
 import authRoutes from './routes/auth.js';
@@ -15,14 +14,17 @@ import messageRoutes from './routes/messages.js';
 import userRoutes from './routes/users.js';
 import pushRoutes from './routes/push.js';
 
+async function main() {
   const app = Fastify({ logger: true });
 
   // VAPID
+  if (process.env.VAPID_PUBLIC_KEY && process.env.VAPID_PRIVATE_KEY) {
     webpush.setVapidDetails(
       `mailto:${process.env.VAPID_EMAIL || 'admin@janichat.ru'}`,
-  process.env.VAPID_PUBLIC_KEY!,
-  process.env.VAPID_PRIVATE_KEY!
+      process.env.VAPID_PUBLIC_KEY,
+      process.env.VAPID_PRIVATE_KEY
     );
+  }
 
   // Plugins
   await app.register(fastifyCors, {
@@ -66,6 +68,14 @@ app.get('/health', async () => ({ ok: true }));
   // WebSocket
   setupWebSocket(app);
 
-// Init
+  // Init DB
   await initDB();
+
+  // Start
   await app.listen({ port: parseInt(process.env.PORT || '3000'), host: '0.0.0.0' });
+}
+
+main().catch(err => {
+  console.error(err);
+  process.exit(1);
+});