Support for ARM images

[giper45]

Woul you able to build images through docker buildx in order to support images for ARM platforms? Useful commands:

1. Create a builder

   docker buildx create --use --name mybuilder

2. Build and push in repository the images (x86 and arm):

   docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 -t pandoc/extra --push  .

To build locally (the same of the previous docker build, the equivalent command is the following:

docker buildx build --load --platform=linux/arm64 .

References:

• https://docs.docker.com/engine/reference/commandline/buildx_build/
• https://docs.docker.com/build/architecture/
• https://medium.com/@artur.klauser/building-multi-architecture-docker-images-with-buildx-27d80f7e2408

Thank you

[rikhuijzer]

Duplicate of https://github.com/pandoc/dockerfiles/issues/134.

[alerque]

@giper45 If any of your command tips and references are new information or not covered in the much earlier discussion on #134 could you please copy them to a comment there? It's possible things have changed since the last look I had that issue, but lets track the progress in one place. Thanks.