multi-arch support

[displague]

Expected Behaviour

PBNJ should be available for use in ARM based environments.

Current Behaviour

PBNJ is only available for amd64. https://quay.io/repository/tinkerbell/pbnj?tab=tags does not show multiple Linux penguin logos per tag, which indicates a multi-arch build.

Context

tinkerbell/tink#226

Your Environment

• Operating System and version (e.g. Linux, Windows, MacOS):

• How are you running Tinkerbell? Using Vagrant & VirtualBox, Vagrant & Libvirt, on Packet using Terraform, or give details:

• Link to your project or a code example to reproduce issue:

[displague]

@jacobweinstock points out that the Go code is portable but ipmitool is a binary added to the image, which is not architecture dependent (not-ARM).