Build is missing architectures, can lead to unexpected results and limited architecture support

[klodner]

docker build command by default builds image for the architecture it is running on so the result is dependent on runtime environment and can be missing desired target architectures.

manifold-docker-build/lib/manifold_docker/commands/base.rb

Line 36 in 96fb55b

exe = "docker build -t #{versioned_image(image, the_version)} -f ./dockerfiles/#{image}/Dockerfile ."

For consistent target architectures support should be used mutliarch build
https://www.docker.com/blog/multi-arch-build-and-images-the-simple-way/

And ARCH=amd64 + ARCH=arm64v8 used

ARM is widespread energy-efficient architecture used by major industry cloud providers and also edge devices allowing Manifold for climate-conscious sustainable publishing solutions.

Keeping ARM builds on users limits significantly the Manifold adoption for this architecture.