Nginx proxy Jupyter on websocket

This nginx config file is fairly standard fare except for the two location blocks within the main section for HUB.DOMAIN.tld. To create a new site for jupyterhub in your Nginx config, make a new file in sites.enabled, e.g. /etc/nginx/sites.enabled/jupyterhub.conf: Please refer to page: https://jupyterhub.readthedocs.io/en/stable/howto/configuration/config-proxy.html