Publish CalVer tags for linux/arm64 platform builds

[weiji14]

The base-image, base-notebook and pangeo-notebook Docker images only had linux/amd64 platform available on the latest and CalVer tags (see e.g. pangeo-notebook:2024.06.28), whereas the master tag has both linux/amd64 and linux/arm64:

Need to use the --platform flag when doing docker pull or docker push, so that the linux/arm64 images will be made available for latest and Calver tags.

Patches #399

[github-actions]

👈 Try on Mybinder.org!

[scottyhq]

good catch!

[weiji14]

I haven't tested this, but you can merge this in @scottyhq and tag a new version to see if it works.

[scottyhq]

This didn't quite work... But fortunately it's okay to break things ;)

I think this is what we need to do:
docker/buildx#1744 (comment)

# TAG -> master -> date / latest
docker buildx imagetools create pangeo/base-image:master -t pangeo/base-image:latest -t pangeo/base-image:2024.07.02

docker buildx imagetools create quay.io/pangeo/base-image:master -t quay.io/pangeo/base-image:latest -t quay.io/pangeo/base-image:2024.07.02

This also looks useful! https://github.com/regclient/regclient

[scottyhq]

🚀 Fixed for images>2024.07.02 https://github.com/pangeo-data/pangeo-docker-images/actions/runs/9767498538

[weiji14]

Ah nice, that docker buildx method looks much cleaner, less lines of code to deal with! Which reminds me, maybe we should revisit buildx a bit more, xref #357.