Please host docker images on ghcr

[kneelesh48]

It takes too long to build the images. Better to build once on ghcr than every user building from scratch.

[husseinmozannar]

We are looking into making this happen, we absolutely agree it will be easier

[SatyKrish]

Pre-built docker image is useful for enterprise environments where dependencies like VNC are either quarantined or not available.

[husseinmozannar]

We've hosted the images and are now updating Magentic-UI to pull from ghcr, thank you for your patience!

[mmurad2]

This is mainly done, @tylerpayne can you update readme / code to help users use the built image?