GoCD comes up with Invalid SSL due to accessing on an IP

[Stono]

Despite using the docker-letsencrypt image, we will get an invalid cert because we access docker on an IP, rather than a domain name.

If we were to make domain names part of this script (thus generating valid certs), then there would be a requirement that the user has provided proof of ownership through the GCP portal first, or the terraform scripts would fail.

Subsequently perhaps this is a toggle option, if provided; we will manage DNS entries too and generate a valid cert.