Update app.py

app.py

@@ -3,9 +3,7 @@ import os
 import openai
 import gradio as gr
 
-ENV O_APIKey=$tokey
-
-openai.api_key =  $tokey
+openai.api_key =  os.environ.get('O_APIKey')
 
 #using a folder
 from llama_index import VectorStoreIndex, SimpleDirectoryReader, SummaryIndex, download_loader