利用koa搭建一个大气美观的博客，顺带重点学习es6/7的语法。
###What is this? This is a simple koa2.0 application template.
###Pulgin
- koa-router
- koa-static
- jade
###Run build and start:
npm run build
and then:
npm start
###Debug set DEBUT=koa* before run application.
DEBUT=koa* npm start