server.js

  // This file doesn't go through babel or webpack transformation.
  // Make sure the syntax and sources this file requires are compatible with the current node version you are running
  // See https://github.com/zeit/next.js/issues/1245 for discussions on Universal Webpack or universal Babel
  const { createServer } = require('http')
  const { parse } = require('url')
  const { join } = require('path')
  const next = require('next')

  const dev = process.env.NODE_ENV !== 'production'
  const app = next({ dev })
  const handle = app.getRequestHandler()

  app.prepare().then(() => {
    createServer((req, res) => {
      // Be sure to pass `true` as the second argument to `url.parse`.
      // This tells it to parse the query portion of the URL.
      const parsedUrl = parse(req.url, true)
      const { pathname, query } = parsedUrl

      if (pathname === '/service-worker.js') {
        const filePath = join(__dirname, '.next', pathname)
        app.serveStatic(req, res, filePath)
      } else {
        handle(req, res, parsedUrl)
      }
    }).listen(3000, err => {
      if (err) throw err
      console.log('> Ready on http://localhost:3000')
    })
  })