SSL enabling for Jupyter and Nginx

Reference: https://medium.com/@nyghtowl/setup-jupyter-notebook-access-on-google-compute-engine-with-https-ad69297f438b

When you have your own domain name and run your service on top of nginx, we can use cerbot to let it automatically renewing your certification. The detailed instructions can be found in https://certbot.eff.org/instructions?ws=nginx&os=ubuntufocal.

When you need to host one kind of service or application by yourself, please check how to request new ssl or enable a self-verified certificate.