Update app.py

app.py

@@ -1,4 +1,5 @@
 import os
+from dotenv import load_dotenv
 
 import json
 import pandas as pd
@@ -13,6 +14,9 @@ import re
 
 import logging
 
+load_dotenv()
+HF_API_KEY = os.getenv("HF_API_KEY")
+
 # Configure logging to write to 'zaoju_logs.log' without using pickle
 logging.basicConfig(
     filename='extract_po_logs.log',