Install it:
pip install flask-appbuilder git clone https://github.com/dpgaspar/Flask-AppBuilder-Skeleton.git
Run it:
fabmanager run
That's it!!
https://github.com/pymupdf/PyMuPDF
Initial steps https://code.visualstudio.com/docs/python/tutorial-flask
How to start Open Code select env ctrl+shift+p open termial from top