def show_server_banner(debug: bool, app_import_path: str | None) -> None:
    """Show extra startup messages the first time the server is run,
    ignoring the reloader.
    """
    if is_running_from_reloader():
        return

    if app_import_path is not None:
        click.echo(f" * Serving Flask app '{app_import_path}'")

    if debug is not None:
        click.echo(f" * Debug mode: {'on' if debug else 'off'}")
Show extra startup messages the first time the server is run,
    ignoring the reloader.
    
src/flask/cli.py