process.env.NODE_ENV = 'production'; const express = require('express'); const createWorker = require('throng'); createWorker(createWebServer) function createWebServer() { const app = express(); app.get('/api/values/:id', function (req, res) { res.send('value'); }); app.listen(5000, function () { console.log( 'Now listening on: http://localhost:5000\nApplication started. Press CTRL+C to shut down.' ) }); }