Update app.py

app.py

@@ -9,6 +9,8 @@ from PIL import Image
 from model_utils import extract_invoice_data_from_image
 from typing import List
 import asyncio
+from concurrent.futures import ThreadPoolExecutor
+
 
 os.environ["MPLCONFIGDIR"] = "/tmp/matplotlib"
 os.environ["YOLO_CONFIG_DIR"] = "/tmp/ultralytics"