This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/leap-micro/5.1/toolbox:10.1
  docker pull registry.opensuse.org/opensuse/leap-micro/5.1/toolbox:10.1-4.15
  docker pull registry.opensuse.org/opensuse/leap-micro/5.1/toolbox:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.