add a comment about NODE_ENV value set to 'production' during build step (#1625)
add a comment about NODE_ENV value set to 'production' during build step (#1625)

* add a comment about NODE_ENV value set to 'production' during build step

https://github.com/facebookincubator/create-react-app/issues/790#issuecomment-281986264

* Move words around

appier/create-react-app,Place1/create-react-app-typescript,josephfinlayson/create-react-app,Place1/create-react-app-typescript,dpoineau/create-react-app,prometheusresearch/create-react-app,CodingZeal/create-react-app,xiaohu-developer/create-react-app,devex-web-frontend/create-react-app-dx,josephfinlayson/create-react-app,devex-web-frontend/create-react-app-dx,powerreviews/create-react-app,Place1/create-react-app-typescript,powerreviews/create-react-app,prometheusresearch/create-react-app,josephfinlayson/create-react-app,xiaohu-developer/create-react-app,Place1/create-react-app-typescript,appier/create-react-app,devex-web-frontend/create-react-app-dx,devex-web-frontend/create-react-app-dx,powerreviews/create-react-app,xiaohu-developer/create-react-app,prometheusresearch/create-react-app,appier/create-react-app,CodingZeal/create-react-app,dpoineau/create-react-app,CodingZeal/create-react-app,dpoineau/create-react-app