Domain mapping with NGINX (aka friendly URLs)

Found Kibana urls come int the format: https://[very-big-hex-noone-can-memory].[zone] I want to access Kibana from, say,

What the NGINX config should look like?

Big plus if I can use the same proxy server for multiple kibana endpoints: -> https://[dev-hex].[zone] -> https://[prod-hex].[zone]

I'm not really sure - it may be worthwhile asking in the Found channel to see if they have any deployment guidance.