This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/prometheus:3
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/prometheus:3.4
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/prometheus:3.4.1
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/prometheus:3.4.1-32.11
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/prometheus:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.