text: const next = require('next');
  const routes = require('./routes');
  const app = next({ dev: process.env.NODE_ENV !== 'production' });
  const handler = routes.getRequestHandler(app);
  
  const { createServer } = require('http');
  app.prepare().then(() => {
    createServer(handler).listen(process.env.PORT || 3000);
  });
  