server.js

const { createServer } = require('http');
const { parse } = require('url');
const next = require('next');
const nextConfig = require('./next.config');

const port = process.env.PORT || 3000;
const dev = process.env.NODE_ENV !== 'production';
const app = next({ dev, conf: nextConfig });

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;
    query.pathName = pathname;

    app.render(req, res, '/index', query);
  }).listen(port, (err) => {
    if (err) throw err;
    // eslint-disable-next-line no-console
    console.log(`> Ready on http://localhost:${port}`);
  });
});