I don't know if GitLab lowercases only the project path (as in the screenshot), or if it lowercases the CI_SERVER_HOST as well. I assume it does both, so I have placed the toLowerCase on the outside of the string, instead of after the this._variables.
Container images have to be lowercased. A quick read of https://docs.gitlab.com/ee/ci/variables/predefined_variables.html does not mention that GitLab automatically lowercases
CI_REGISTRY_IMAGE, but it does so in practice (see below)I don't know if GitLab lowercases only the project path (as in the screenshot), or if it lowercases the
CI_SERVER_HOSTas well. I assume it does both, so I have placed thetoLowerCaseon the outside of the string, instead of after thethis._variables.