react服务端渲染详解
详见1:https://www.jianshu.com/p/47c8e364d0bc?appinstall=1&mType=Group
及2:https://segmentfault.com/a/1190000018672269#articleHeader14
react官方:https://zh-hans.reactjs.org/docs/react-dom-server.html
github demo1:https://github.com/yangfan0095/react-koa2-ssr
github demo2:https://github.com/fridaydream/react-cnode-ssr