https://www.youtube.com/watch?v=934fLu3619k&feature=youtu.be&ab_channel=PatrickLin
# install front-end
cd frontend
npm install
# install back-end
pip install -r requirements.txt
# serve back-end at localhost:5000
FLASK_APP=run.py flask run
# build for production/Flask with minification
npm run build
# By 田亦心,林智平