Route application root to /swagger

What is the correct way to redirect request from www.mysite.com to www.mysite.com/swagger?

I setup an index controller Decorated with Route("") and it works but seems like a Kludge. I assume there should be a way to specify it in the MVC routing in Startup.cs, I just can't figure it out.

// kludge code, how do I do this in app.UseMvc(route => route.MapRoute...
[ApiExplorerSettings(IgnoreApi = true)]
[Route("")]
public class IndexController : Controller
{
    public ActionResult Index()
    {
        return Redirect("/swagger");
    }
}