Update app.py

app.py

@@ -38,8 +38,9 @@ def extract_snapshots(watchface_link: str, output_type='Both') -> list[str]:
 def extract_snapshots_from(watchface_links: list[str], output_kind='Both') -> list[str]:
     assert(watchface_links != None and len(watchface_links) >= 1)
 
+    filtered_watchface_links = [link for link in watchface_links if link.endswith('watchface')]
     snapshots = []
-    for watchface_link in watchface_links:
+    for watchface_link in filtered_watchface_links:
         images = extract_snapshots(watchface_link, output_kind)
         images = list(map(rename_file, images))
         snapshots += images