This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/factory/snapshot/charts/upgrade-controller:999.0.0_up0.1.1
  docker pull registry.opensuse.org/isv/suse/edge/factory/snapshot/charts/upgrade-controller:999.0.0_up0.1.1-114.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.