i've built a Dockerized version of the kratos-selfservice-ui-node project that connects Hydra to Kratos. when i click on registration, it opens the URL http://127.0.0.1:3000/.ory/kratos/public/self-service/registration/browser?return_to= in a new tab. but that URL returns a 404 in the browser. where should i look for figuring out why that happens? i have a very rudimentary understanding of the Ory system so apologies for my newbie questions. i just don't understand what's happening here. where does that request go to? is that handled by the Kratos Docker container? what are the possible reasons it could return a 404?