proxy healthprobes without auth

[thomasjungblut]

hey,

can we expose a couple of paths through the nginx config that should not go through the basic auth?
I know we have the nginx_status to wire up healthprobes with, but we would like to actually monitor the application behind it. So we would love to just let the /healthz go through to the PROXY_PASS and use that as the probe.

Any pointers on how this can be done easily? Happy to contribute and do the changes myself :)

Cheers,
Thomas