Demos 是一个风格简洁的代码编辑器，用来写demo，小案例等。
Demos 基于 Koa 与 MongoDB 开发
# clone from git
$ git clone git@github.com:berwin/demos.git
$ cd demos
# install dependencies
$ npm install
# copy the default configuration file
$ cp config/default.js config/index.js
# modify configuration file
$ vim config/index.js
# run
node app.js# Start
pm2 start process.json
# Reload
pm2 reload process.json
# Delete
pm2 delete process.json