Fixed server.js file

Author: gabrielepace

server.js

@@ -10,4 +10,6 @@ app.use('/login', (req, res) => {
     });
 });
 
-app.listen(8080, () => console.log('API is running on http://localhost:8080/login'));
+const PORT = process.env.PORT || 8080;
+
+app.listen(PORT, () => console.log(`API is running on http://localhost:${PORT}/login`));