I want to inject the latest tag of a ci-build base image in the template push - so my image is tagged with

$CI_PIPELINE_IID-$CI_COMMIT_SHORT_SHA

and I want to use this value then in my template which gets pushed from the same pipeline run. So I've created a terraform variable

variable "IMAGE_NAME" {
  type = "string"
}

which I then use in the docker related resources.