Add trust proxy for correct HTTPS detection behind reverse proxies

server/index.js

@@ -7,6 +7,10 @@ require('./db');
 const app = express();
 const PORT = process.env.PORT || 3000;
 
+// Trust proxy headers (X-Forwarded-Proto, X-Forwarded-For, etc.)
+// Required for correct protocol detection behind reverse proxies (nginx, Caddy, etc.)
+app.set('trust proxy', true);
+
 // Middleware
 app.use(express.json({ limit: '50mb' }));
 app.use(express.static(path.join(__dirname, '..', 'public')));