Only issue wildcard certs

[AskAlice]

Because letsencrypt certificates are public knowledge, it only makes sense to only utilize and issue wildcard certs to obscure the names of services to avoid getting scrubbed by security researchers constantly.

Thoughts?

[onedr0p]

This is already done, it sets up a WC certificate by default.

https://github.com/onedr0p/flux-cluster-template/blob/main/kubernetes/apps/networking/ingress-nginx/certificates/certificates.yaml

It was done back here... #592