## Is your feature request related to a problem? Please describe I want to be able to build docker images with leeway that can target ARM64 cpus, without needing to switch to an ARM machine in development ## Describe the behaviour you'd like An option to specify target architecture for docker which can make use of the [docker buildx](https://github.com/docker/buildx) extension. Leeway already allows specifying GOARCH to compile go binaries for ARM64 targets, a similar feature for docker builds would also be extremely helpful ## Describe alternatives you've considered Running the entire build on an ARM machine. I would assume that this would lead to the build automatically being created for an ARM target However, this would require both devs and CI pipelines to switch/add a new machine to their workflows to build for ARM