There shouldn't be any signing up needed, as it's an open beta.

You should already see `Container` listed as a package type in the UI, and can begin publishing packages by creating a personal access token with `read:packages` and `write:packages` scopes as appropriate - https://docs.github.com/en/github/authenticating-to-github/c...

You don’t need to sign up. It’s open to everyone with a GitHub Account. Also, you don’t need to use Actions. You can just push a container. Here’s a doc that shows you how to push a container. https://docs.github.com/en/packages/getting-started-with-git...