Update app.py

app.py

@@ -23,6 +23,7 @@ from langchain_core.output_parsers import JsonOutputParser
 from langchain_community.vectorstores.utils import filter_complex_metadata
 from langchain.schema import Document
 from langgraph.graph import START, END, StateGraph
+from langchain_community.document_loaders.directory import DirectoryLoader
 from functions import *