Update start.sh

start.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
 uvicorn main:app --host 0.0.0.0 --port 8000 &
 # export BACKEND_URL not strictly needed as it is hardcoded in app.py now for stability
-streamlit run app.py --server.port 7860 --server.address 0.0.0.0 --server.enableCORS=false --server.enableXsrfProtection=false
+python app.py --server.port 7860 --server.address 0.0.0.0 --server.enableCORS=false --server.enableXsrfProtection=false