update the chatbot

app.py

@@ -8,8 +8,9 @@ from llama_index.llms.openai import OpenAI
 from llama_index.embeddings.openai import OpenAIEmbedding
 from llama_index.core.postprocessor import MetadataReplacementPostProcessor
 from llama_index.core.node_parser import SentenceWindowNodeParser
-
 from dotenv import load_dotenv
+
+# Load environment variables
 load_dotenv("config.env")
 
 # Set your OpenAI API key here
@@ -145,4 +146,4 @@ iface = gr.ChatInterface(
 )
 
 # Launch the interface
-iface.launch(share=True)
+iface.launch(share=True)