Add React SSR support - Githubissues

🎉 Add simple React SSR(Server Side Rendering) support for your SPA app

also including the following changes:

✨Add LOG_PATH & ENABLE_SSR config
💾Change mw dir name to services
👢Use Bootstrap scss files for easy customization instead of the compiled one
✂️Remove webpack-dashboard, kind of slowing down the install process
✂️Simplify the index.html file, other assets or dynamic nunjucks template tags will be injected by webpack

First enable ENABLE_SSR: true in your app-config.js or env， also HMR should be disabled(maybe can use them together in the future) since we are using our own server logic to do SSR, also set STATIC_PREFIX to some not empty value, e.g /static, to prevent html error when access '/' home page, which is handle directly by static middleware without rendering by nunjucks.
You will need to use npm run watch(your client react app)
Use npm run ssr -- --watch to transpile the SSR related source code to be required in your node.js code, see routes/index.js
Use npm start(your koa server) to let the koa server do SSR stuff
Go to the browser to see the responsed html doc

Use SSR Stream API
Need a cache policy for SSRed content
Universal React Route Config ?
Automatically restart koa server when ssr related code changed(with nodemon?) after ssr script rerunned