Fix inter-services communication

deployment/frontend/server.ts

@@ -1,9 +1,10 @@
 import express from 'express';
+import type { Request, Response } from 'express';
 import { createProxyMiddleware } from 'http-proxy-middleware';
 import { resolve } from 'path';
 
 const app = express();
-const port = process.env.PORT || 3000;
+const port = Number(process.env.PORT) || 8301;
 const backendHost = process.env.BACKEND_HOST || "http://localhost:8300";
 const filePath = process.env.STATIC_FILE_PATH || ".";
 
@@ -15,14 +16,17 @@ app.use('/api', createProxyMiddleware({
     ws: true
 }));
 
+// WebSockets are handled by the general API proxy above
+
 // Serve static files
 app.use(express.static(resolve(filePath)));
 
 // SPA routing - catch all handler for client-side routing
-app.use((_req, res) => {
+app.use((_req: Request, res: Response) => {
     res.sendFile(resolve(filePath, 'index.html'));
 });
 
-app.listen(port, () => {
-    console.log(`Server launched on http://localhost:${port}`);
+app.listen(port, '0.0.0.0', () => {
+    console.log(`Backend host: ${backendHost}`);
+    console.log(`Server launched on http://0.0.0.0:${port}`);
 });