const { createServer } = require('http') const next = require('next') const routes = require('./routes') const dev = process.env.NODE_ENV !== 'production' const app = next({ dev }) const handler = routes.getRequestHandler(app) app.prepare() .then(() => { createServer(handler) .listen(3000, (err) => { if (err) throw err console.log('> Ready on http://localhost:3000') }) })