Add Architecture option to "docker images" list

[ericsmalling]

Description
Please add the ability to see the architecture for images in the cache via docker images / docker image ls.

Even if it's just an additional --format field, that would be valuable

[BretFisher]

I agree with this! On an arm device, like a Apple M1, it's confusing what docker is picking for arm vs. amd64 images. I just had a case where I was accidentally using a amd64 image on arm64 because I had previously pulled that specific platform and forgot it was different... then docker just defaults to your last pulled platform for that tag.

To me, platform is just part of the image name (repo name + tag + platform), and it should be viewable without needing a inspect command.

Bonus points if there's an asterisk if the platform of image <> platform of dockerd, to highlight where you've manually chosen to emulate.

[sam-thibault]

see also:

• UX: improve / design UX for multi-arch images moby/moby#44582