This container can be pulled via:
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp5/5-1050/containerfile/bci/gcc:7
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp5/5-1050/containerfile/bci/gcc:7-1.22
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp5/5-1050/containerfile/bci/gcc:7.5
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp5/5-1050/containerfile/bci/gcc:7.5-1.22

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.