clean up tmp dir after each run

app.py

@@ -202,7 +202,7 @@ def clear_tmp_directory():
     image_extensions = {'.jpg', '.jpeg', '.png', '.gif', '.bmp', '.tiff', '.webp'}
     for root, dirs, files in os.walk('/tmp'):
         for file in files:
-            if not file.startswith('advance-blurred-'):
+            if not file.startswith('advance-blurred-') and not file.startswith('before.jpg') and not file.startswith('after.jpg'):
                 ext = os.path.splitext(file)[1].lower()
                 if ext in image_extensions:
                     full_path = os.path.join(root, file)