Docker: Manjaro KDE Plasma image?

Hello there. Newbie here.

Just wondering. I’ve just learning to use Docker.
Been curious and wanted to run Manjaro KDE Plasma on Docker but kinda confused on how to get the image.

Can I just download the installation file from the Manjaro website? How does it turn into a Docker image?

If you want to run a GUI Desktop in Docker you’re gonna want x11docker