This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/bci/spack:0.23
  docker pull registry.opensuse.org/opensuse/bci/spack:0.23.1
  docker pull registry.opensuse.org/opensuse/bci/spack:0.23.1-36.6
  docker pull registry.opensuse.org/opensuse/bci/spack:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.