This container can be pulled via:
  docker pull registry.opensuse.org/home/defolos/bci/cr/sle-15-sp6/containerfile/bci/gcc:7
  docker pull registry.opensuse.org/home/defolos/bci/cr/sle-15-sp6/containerfile/bci/gcc:7-12.6
  docker pull registry.opensuse.org/home/defolos/bci/cr/sle-15-sp6/containerfile/bci/gcc:7.5
  docker pull registry.opensuse.org/home/defolos/bci/cr/sle-15-sp6/containerfile/bci/gcc:7.5-12.6

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.