add nest_asyncio

app.py

@@ -9,8 +9,11 @@ from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.prompts import PromptTemplate
 from langchain_core.runnables import RunnablePassthrough
 from langchain_core.output_parsers import StrOutputParser
-
 import tempfile
+import nest_asyncio
+
+# Apply nest_asyncio
+nest_asyncio.apply()
 
 # Constants
 LLM_MODEL = "gemini-1.5-flash"