Suggested Improvement - Templating for .Values.hostname

Feature Request

Apply hostname value globally without additional changes. For example, if I set hostname: mydomain.com I also have to set addons.gitlab.hostnames.gitlab: gitlab.mydomain.com and addons.gitlab.hostnames.registry: registry.mydomain.com

Why

As a developer deploying Big Bang
I Want to simplify the quantity of changes for my environment
So that Big Bang is easier to consume and utilize

Proposed Solution

there may be other places where this applies

1. Set values.yaml L580 to gitlab
2. Set values.yaml L581 to registry
3. Update [chart/templates/gitlab/values.yaml#L59] and [chart/templates/gitlab/values.yaml#L62] to derive from both {{ .Values.hostname }} and {{ .Values.addons.gitlab.hostnames.gitlab/registry }}