Update app.py

app.py

@@ -224,3 +224,9 @@ try:
                     st.session_state.messages.append({"role": "assistant", "content": f"Sorry, I encountered an error: {error_message}", "sources": []})
     
     print("--- app.py script finished a run ---")
+    
+except Exception as e:
+    print(f"!!!!!!!!!! A FATAL ERROR OCCURRED DURING STARTUP !!!!!!!!!!")
+    import traceback
+    print(traceback.format_exc())
+    st.error(f"A fatal error occurred during startup. Please check the container logs. Error: {e}")