Auto DevOps is generating domain names that are too long

According to https://tools.ietf.org/html/rfc1035

Labels must be 63 characters or less.

Where a label is defined as any section of the domain name between .. Occasionally our Auto DevOps pipeline will generate a domain name that exceeds this limit and this can sometimes fail to resolve DNS.

Also I've found that Let's encrypt will also fail for long domains with:

error getting certificate from acme server: acme: urn:ietf:params:acme:error:malformed: Error finalizing order :: CN was longer than 64 bytes

So this will cause problems when we implement cert-manager.

I think for production our $CI_PROJECT_PATH_SLUG will ensure that our domain name does not exceed 63 characters but review apps use $CI_PROJECT_PATH_SLUG-$CI_ENVIRONMENT_SLUG as the subdomain which I believe can exceed this limit. In other testing I did notice that even on production apps I was running into the Let's Encrypt limit which seems to enforce that the entire domain name cannot exceed 64 characters even if an individual section does not exceed 64 characters.