This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/3.4/charts/upgrade-controller:304.0.3_up0.1.3
  docker pull registry.opensuse.org/isv/suse/edge/3.4/charts/upgrade-controller:304.0.3_up0.1.3-37.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.