Update app.py

app.py

@@ -134,7 +134,7 @@ def get_file_extension(filename: str) -> str:
 
 def is_valid_image(extension: str) -> bool:
     """Check if the file extension is a valid image type."""
-    return extension in ['.jpg', '.jpeg', '.png', '.gif', '.bmp', '.webp']
+    return extension in ['.jpg', '.jpeg', '.png', '.gif', '.bmp', '.webp', '.svg']
 
 def authenticate(request: Request):
     """Check if user is authenticated."""