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:

# Top-level HTTP config for WebSocket headers
# If Upgrade is defined, Connection = upgrade
# If Upgrade is empty, Connection = close
map $http_upgrade $connection_upgrade {
    default upgrade;
    ''      close;
}

# {domain} -> {port number}
server {
        
    server_name     {domain};

    location / {
        proxy_pass      http://127.0.0.1:{port number};
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        # websocket headers
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header X-Scheme $scheme;

        proxy_buffering off;
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/lab.divogy.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/lab.divogy.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

Please refer to page: https://jupyterhub.readthedocs.io/en/stable/howto/configuration/config-proxy.html