This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/3.3/images/3.3/metallb-controller:v0.14.9
  docker pull registry.opensuse.org/isv/suse/edge/3.3/images/3.3/metallb-controller:v0.14.9-12.5

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.