feat(router): route to controller by default

This routes all requests made to the domain redirect to the
controller.

TESTING: rebuild the router with this change:

    $ make -C router build restart

then, try to send a GET request to both local.deisapp.com and
www.local.deisapp.com. They should both redirect to the controller's
home page.

Note that this should hypothetically work (read: I have not tested this yet). Will update after I test this PR.