Describe

Sometimes there are situations when it is necessary for the current project to create a subdomain just as another rout.
And hang on to this subdomain a handler that is already there.

Expected behaviour

For example it might look something like this:

app.router.add_route('GET',  '/',  main_page)
app.router.add_route('GET',  '/',  handler, subdomain="domain")

def handler():
      print('text')