Update app.py

app.py

@@ -10,6 +10,7 @@ from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_community.llms import HuggingFacePipeline
 from transformers import BitsAndBytesConfig
 from langchain.embeddings.huggingface import HuggingFaceEmbeddings
+from langchain_community.llms import HuggingFaceEndpoint
 
 from langchain.prompts import PromptTemplate
 from langchain.schema.runnable import RunnablePassthrough