text: /**
   * Created by chang_su on 2017/6/12.
   */
  const Koa = require('koa')
  const app = new Koa()
  
  app.use( async ( ctx ) => {
      ctx.body = 'hello koa2'
  })
  
  app.listen(3000)
  console.log('[demo] start-quick is starting at port 3000')