Github: https://github.com/Reine0017/reactFlaskTutorial
new: https://medium.com/towards-data-science/build-deploy-a-react-flask-app-47a89a5d17d9 has how to deploy on
old: https://medium.com/swlh/how-to-build-an-app-with-react-flask-12dfc4e875a5 has how to test from postman
Reine's site: https://reine-ran.medium.com/