code: def welcome_page(self):
          
          message = "HTTP/1.1 200 OK RINZLER FRAMEWORK"
          return HttpResponse(
              "<center><h1>{0}({1})</h1></center>".format(message, self.app.app_name),
              content_type="text/html", charset="utf-8"
          )
docs: Defaulf welcome page when the route / is note mapped yet
          :rtype: HttpResponse