text: const { createServer } = require('http')
  const next = require('next')
  const routes = require('./routes')
  
  const port = parseInt(process.env.PORT, 10) || 3000
  const dev = process.env.NODE_ENV !== 'production'
  const app = next({ dev })
  const handler = routes.getRequestHandler(app)
  
  app.prepare()
  .then(() => {
    createServer(handler)
    .listen(port, (err) => {
      if (err) throw err
      console.log(`> Ready on http://localhost:${port}`)
    })
  })