Containers built on archlinux won't build on an Arm based mac

[GlennPegden2]

Containers built on archlinux won't build on an Arm based mac

There are unofficial Arm based archlinux docker images, but none seems to support qemu properly

[GlennPegden2]

Alpine based containers seem to work ok on Arm Mac, propose we standardise on that

[GlennPegden2]

Built the new v7x86 host on alpine and it seems to build clean. Need to check the networking works before I roll out the change to all arch based container.