Imports
- github.com/docker/distribution
- github.com/docker/distribution/reference
- github.com/docker/distribution/registry/api/errcode
- github.com/docker/distribution/registry/api/v2
- github.com/docker/distribution/registry/client/auth/challenge
- github.com/docker/distribution/registry/client/transport
- github.com/docker/distribution/registry/storage/cache
- github.com/docker/distribution/registry/storage/cache/memory
- github.com/opencontainers/go-digest