How to create a Jupyter Notebook file
https://www.earthdatascience.org/courses/intro-to-earth-data-science/open-reproducible-science/jupyter-python/get-started-with-jupyter-notebook-for-python/
https://blog.51cto.com/u_15064628/2600860
https://stackoverflow.com/questions/45622602/how-to-save-jupyter-notebooks-from-github
https://gist.github.com/fperez/9716279
https://hplgit.github.io/doconce/doc/pub/ipynb/ipynb_generator.html