数据库 mongodb 用keystone
https://davidcai1993.gitbooks.io/nodejs-api-doc-in-chinese/content/HTTP.html

node socket
http://www.w2bc.com/article/202754
http://www.zuidaima.com/share/2082681790860288.htm
https://blog.yasking.org/a/nodejs-reactjs-socketio.html
http://www.yaocheap.com/phptec/252.html
http://www.itwendao.com/article/detail/262636.html