Provide preconfigured docker ARM images

Consider providing ARM based images for ckan-docker

ARM-based Docker images will accommodate the increasing use of ARM architecture in both development environments and cloud services. ARM processors offer enhanced energy efficiency and performance, making more likely to be found in development machines, and cheaper to run as cloud instances.

By supporting ARM-based images, the library ensures wider compatibility, better performance, and a smoother development experience across diverse hardware. It also reduces the friction of setting up cross-compilation environments.

I would like to be able to use this form in my Dockerfile
FROM --platform=linux/arm64 ckan/ckan-dev:2.11.0