Differences between zip project and the container setting up the initial user

I see a difference in the initial configuration between the project I download from the official keycloak website and the image I download from quay.io
When I download the zip with the project and start it (./bin/kc.sh start-dev) I get a form to create my first user.

On the other hand, when I launch a container based on the latest keycloak image, the form does not appear and sends you to a url (/auth) that no longer exists in the quarkus version.

Why this difference? is there any option to create the initial user through this form in the container?