GitHub Container registry

Hello community,

I need some help or guidance, on how to setup GitHub as a container registry for our own Project, I have to mention that all our code is stored in AWS, but the images(artifacts) are stored in Bitbucket OnPrem, and we want to move from Bitbucket to GitHub Container registry.
Another mention, everything has to be On Premise.
So, is it possible to make this switch, and if YES, how?
Thank you.
Best regards,
Florin