Update app.py

app.py

@@ -3,7 +3,8 @@ import threading
 from flask import Flask, render_template, request, jsonify
 from rss_processor import fetch_rss_feeds, process_and_store_articles, vector_db, download_from_hf_hub, upload_to_hf_hub, clean_text
 from langchain.vectorstores import Chroma
-
+from langchain.embeddings import HuggingFaceEmbeddings
+from langchain.docstore.document import Document
 import logging
 import time
 from datetime import datetime