import alicdn package

Signed-off-by: Shawn Chen <chen8132@gmail.com>

cmd/registry/main.go

@@ -12,6 +12,7 @@ import (
 	_ "github.com/docker/distribution/registry/storage/driver/filesystem"
 	_ "github.com/docker/distribution/registry/storage/driver/gcs"
 	_ "github.com/docker/distribution/registry/storage/driver/inmemory"
+	_ "github.com/docker/distribution/registry/storage/driver/middleware/alicdn"
 	_ "github.com/docker/distribution/registry/storage/driver/middleware/cloudfront"
 	_ "github.com/docker/distribution/registry/storage/driver/middleware/redirect"
 	_ "github.com/docker/distribution/registry/storage/driver/oss"