server.js

const express = require('express');
const next = require('next');
const cookieParser = require('cookie-parser');

const port = parseInt(process.env.PORT, 10) || 3000;
const dev = process.env.NODE_ENV !== 'production';
const app = next({ dev });
const handle = app.getRequestHandler();

const apiRoutesRegExp = /^\/api\/.+$/;

app.prepare().then(() => {
  const server = express();
  server.use(cookieParser());

  server.post(apiRoutesRegExp, (req, res) => {
    return handle(req, res);
  });

  server.delete(apiRoutesRegExp, (req, res) => {
    return handle(req, res);
  });

  server.patch(apiRoutesRegExp, (req, res) => {
    return handle(req, res);
  });

  server.get('*', (req, res) => {
    return handle(req, res);
  });

  server.listen(port, err => {
    if (err) throw err;
    console.log(`> Ready on http://localhost:${port}`);
  });
});