This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/clusterapi/containerfile/cluster-api-operator:0.12.0
  docker pull registry.opensuse.org/isv/suse/edge/clusterapi/containerfile/cluster-api-operator:0.12.0-1.21

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.