Mitigating Let's Encrypt Rate Limiting Issues

## what
We're concerned about LetsEncrypt rate limiting issues. It's fair enough to switch our staging environment over to using Lets Encrypt's staging env, but I'm concerned about this in production.

## why

It basically means we could be blocked from changes to our infrastructure if let's encrypt rate limits us again. So we need a solution to that in some respect. Naively we could switch to using a wildcard cert. *.example.net and just make sure all of the servers use the dns name of server-123-123.example.net