Feature: metrics endpoint for the autohttps TLS termination proxy

[consideRatio]

trafficstars

Proposed change

I'd like to see our autohttps deployment be able to provide metrics that prometheus can scrape.

Who would use this feature?

Users of the helm chart that wants to ensure they don't bottleneck because low resources on this proxy pod.

(Optional): Suggest a solution

I suggest we experiment with this Traefik configuration in our autohttps/configmap.yaml