text: // server.js
  const next = require('next')
  const routes = require('./routes')
  const app = next({ dev: process.env.NODE_ENV !== 'production' })
  const handler = routes.getRequestHandler(app)
  const port = process.env.PORT || 3000
  
  
  // Without express
  const { createServer } = require('http')
  app.prepare().then(() => {
      createServer(handler).listen(port)
  })