Update app.py

app.py

@@ -14,6 +14,7 @@ from langchain.callbacks import get_openai_callback
 from io import BytesIO
 from langchain.chains.combine_documents import create_stuff_documents_chain
 from langchain_core.prompts import ChatPromptTemplate
+from chromadb.config import Settings
 
 openai.api_key = os.getenv("OPENAI_API_KEY")