implement FilesystemBlobBackend
hook into a BlobsResource a minimal implementation of the BlobsBackend interface that (a) saves a blob to the FS (b) reads a blob from the FS and passes it back to the Resource that will write back to the request
hook into a BlobsResource a minimal implementation of the BlobsBackend interface that (a) saves a blob to the FS (b) reads a blob from the FS and passes it back to the Resource that will write back to the request