Updating to langchain-community

app/server.py

@@ -1,8 +1,8 @@
 from fastapi import FastAPI
 from fastapi.responses import RedirectResponse
 from langserve import add_routes
-from langchain.vectorstores import FAISS
-from langchain.llms import HuggingFaceHub
+from langchain_community.vectorstores import FAISS
+from langchain_community.llms import HuggingFaceHub
 import os
 from langchain.prompts import ChatPromptTemplate
 from langchain_core.runnables import RunnablePassthrough, RunnableParallel