Update app.py

app.py

@@ -51,7 +51,7 @@ def display_iframe():
     # Read the URL from the environment variable 'IFRAME_URL'
     # os.getenv returns None if the variable isn't set
     url_from_env = os.getenv('IFRAME_URL')
-
+    print(url_from_env)
     # Pass the URL to the template rendering function
     # Flask's render_template_string automatically handles basic HTML escaping
     # for security if used directly in text, but here it's okay for the src attribute.