Update app.py

Fixing the set_page_config

app.py

@@ -3,13 +3,14 @@ from upload import upload_file_to_vectara
 from query import process_queries
 import os
 
+# Ensure set_page_config is the first Streamlit command
+st.set_page_config(page_title="STC Bank Assistant", layout="centered")
+
 # Load external CSS
 with open("style.css") as f:
     st.markdown(f"<style>{f.read()}</style>", unsafe_allow_html=True)
 
 # Streamlit UI
-st.set_page_config(page_title="STC Bank Assistant", layout="centered")
-
 st.markdown("""
     # Welcome to the STC Bank Assistant
     
@@ -18,13 +19,15 @@ st.markdown("""
     #### Add additional files here
 """)
 
-customer_id = str(os.environ['VECTARA_CUSTOMER_ID'])
-api_key = str(os.environ['VECTARA_API_KEY'])
-corpus_id = str(os.environ['VECTARA_CORPUS_ID'])
-corpus_key = str(os.environ['VECTARA_CORPUS_KEY'])
+# Fetch credentials from environment variables
+customer_id = os.getenv("VECTARA_CUSTOMER_ID", "")
+api_key = os.getenv("VECTARA_API_KEY", "")
+corpus_id = os.getenv("VECTARA_CORPUS_ID", "")
+corpus_key = os.getenv("VECTARA_CORPUS_KEY", "")
+
 uploaded_files = st.file_uploader("Upload PDF, DOCX, or XLSX files", type=["pdf", "docx", "xlsx"], accept_multiple_files=True)
 
-if uploaded_files and customer_id and api_key and corpus_id:
+if uploaded_files and customer_id and api_key and corpus_id and corpus_key:
     for file in uploaded_files:
         response = upload_file_to_vectara(file, customer_id, api_key, corpus_key)
         st.write(f"Uploaded {file.name}: {response}")