text: const Koa =  require('koa');
  const app =  new Koa();
  const views = require('koa-views');
  const { resolve } = require('path');
  
  app.use(views(resolve(__dirname, './views'), {extension: 'pug'}))
  
  app.use(async(ctx) => {
  	await ctx.render('index', {user:{firstname: 'michael', lastname: 'yao'}})
  })
  
  app.listen(4455);
  