MAIN_URL / FRONTEND_URL / NEXT_PUBLIC_BACKEND_URL

[pat-s]

It seems that for a production-ready setup, these values need to be set to the same value as the ingress URL.

Instead of requiring the user to set these (and likely miss one), the chart could have one generic setting for this which sets these values behind the scenes.

[davidreis97]

Grafana is very nice in this regard, it gives you these two options:

root_url: "%(protocol)s://%(domain)s:%(http_port)s/grafana/"
serve_from_sub_path: true

Which basically makes it work for all hosts. Useful for a home lab where hosts are flexible and HTTPS doesn't matter.