This container can be pulled via:
  docker pull registry.opensuse.org/home/nbelouin/factorybmotest/charts/rancher-turtles:999.0.4_up0.20.0
  docker pull registry.opensuse.org/home/nbelouin/factorybmotest/charts/rancher-turtles:999.0.4_up0.20.0-3.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.