server.js

require('isomorphic-fetch');
require('dotenv');

const nextRoutes = require('next-routes');

const routes = nextRoutes();

const express = require('express');
const next = require('next');
const bodyParser = require('body-parser');
const unsupportedBrowser = require('./unsupported-browser');

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

const { PORT } = process.env;

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

    const port = PORT || 3000;

    server.use(bodyParser.json());
    server.use(bodyParser.urlencoded({ extended: false }));

    server.use(unsupportedBrowser);

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

    server.listen(port, (err) => {
      if (err) throw err;
      console.log(`> Ready on http://localhost:${port}`);
    });
  })
  .catch((ex) => {
    console.error(ex.stack);
    process.exit(1);
  });