Update app.py (#8)

- Update app.py (88472fe65772b6d9d2e9729c40e52c79d83a578d)

app.py

@@ -4,6 +4,7 @@ import requests
 import json
 import shutil
 from huggingface_hub import HfApi, create_repo
+from typing import Union
 
 def download_file(digest, image):
     url = f"https://registry.ollama.ai/v2/library/{image}/blobs/{digest}"