flow.md

create-react-app testapp
cd testapp

// dev flow
yarn start

// build flow
yarn build
cd build

// you need to serve your files
npm install -g http-server
http-server

// open in http://127.0.0.1:8080 or whatever it says its serving it on

If you are serving this on Amazon EC2 or a webserver, you probably have to set up more stuff.