feat(build): create multiplatform image

[pilartomas]

Signed-off-by: Tomas Pilar [email protected]

• Feature / Enhancement: [Feature Request]: Publish a multi-architecture container (including ARM64) support #80

Unfortunately, one can't simply enable build multi-platform image without pushing it. This is explained in https://docs.docker.com/reference/cli/docker/buildx/build/#load and further discussed in docker/buildx#65. I had to restructure the pipeline a bit.

[crivetimihai]

Thank you, that's awesome! Could you also please take a look at the Makefile to see if some of the targets there need an update as well?

Will review, test and merge this PR after the 0.3.0 release (which gets tagged later today). It will likely be available as a tagged image with 0.3.1 (2025-08-15) or 0.4.0 (2025-08-22)

[pilartomas]

There seems to be a certificate problem within the arm64 build. I must look into it further.

[pilartomas]

It appearch that the builder stage doesn't work properly for ARM64 setup. The surface error is about missing /bin/sh but resolving that by pre-installing bash only leads to another issue with repositories.

What's strange is that everything builds just fine on my local machine (M1).

I don't think I'll be able to resolve it myself without large changes in the containerfile but that might break some other functionality I am unaware of.

[crivetimihai]

Need to look at this in context of #80