.

backend/config.js

@@ -0,0 +1,5 @@
+var config = {};
+
+config.PORT = 3000;
+
+module.exports = config;

backend/server.js

@@ -0,0 +1,6 @@
+const express = require('express');
+const config = require('./config');
+
+const app = express();
+
+app.listen(config.PORT, ()=>{console.log('Server running on port ' + config.PORT)});