Update

backend/index.js

@@ -10,7 +10,7 @@ dotenv.config();
 const app = express();
 app.use(express.json());
 
-const PORT = process.env.PORT || 4000;
+const PORT = 4000;
 
 // HTTPS Agent für Self-Signed-Zertifikate
 const agent = new https.Agent({ rejectUnauthorized: false });