Building flathub for development

I’m trying to build flathub using docker for development using the GitHub description: GitHub - flathub-infra/website: Monorepo with website and API.

But I can’t get the localhost to work.
The command did not work because of the “-X”.
When I try to view it using my browser, the SSL length is too high.

What can I try to fix it?

It’s difficult to help you without full logs of commands you ran and/or didn’t work. Can you confirm the backend container is running and listening at the correct port?

Well it is running, put it has no port…

Any logs from docker compose?

Sorry for the late response.
Here is the log from docker: 2025-01-13 18:58:12 backend-1 | INFO [alembic.runtime.migration] Cont - Pastebin.com
Everything is running in docker:

2025-01-19 17:24:00 backend-1           | sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) could not translate host name "db" to address: Name or service not known

This is the problem. The backend service won’t work without the database. When everything works fine, db would be resolvable DNS name as is. What app is this? Is this docker or podman?

Running docker on win 11