This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp3/containerfile/bci/dotnet-sdk:3.1
  docker pull registry.opensuse.org/devel/bci/sle-15-sp3/containerfile/bci/dotnet-sdk:3.1-13.74
  docker pull registry.opensuse.org/devel/bci/sle-15-sp3/containerfile/bci/dotnet-sdk:3.1.29
  docker pull registry.opensuse.org/devel/bci/sle-15-sp3/containerfile/bci/dotnet-sdk:3.1.29-13.74

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.