renovate/lib/modules/manager/gitlabci/readme.md

Extracts Docker dependencies from gitlab-ci.yml files.

If you need to change the versioning format, read the versioning documentation to learn more.

If you use Gitlab Dependency Proxy then you can use these predefined variables as prefixes for your image:

• CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX
• CI_DEPENDENCY_PROXY_DIRECT_GROUP_IMAGE_PREFIX

If you use the predefined CI_REGISTRY variable make sure to configure its value via registryAliases:

{
  "registryAliases": {
    "$CI_REGISTRY": "registry.example.com"
  }
}