text: const { createServer }=require('http');
  const next = require('next');
  
  const app = next({
    dev: process.env.NODE_ENV!=='production'
  });
  
  const routes =require('./routes.js');
  const handler = routes.getRequestHandler(app);
  
  app.prepare().then(()=>{
    createServer(handler).listen(3000, (err)=>{
      if(err) throw err;
      console.log("Ready of localhost: 3000");
    });
  });
  