This container can be pulled via:
  docker pull registry.opensuse.org/home/nbelouin/factorylint/images/metallb-controller:v0.14.9
  docker pull registry.opensuse.org/home/nbelouin/factorylint/images/metallb-controller:v0.14.9-1.8

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.