build docker images with buildx

[MrMondrian]

The images currently hosted on docker hub are built only for amd64, but they need to be rebuilt for amd64 AND arm64 to accommodate mac users when they return. Only need to do this for base sim and poolside (in that order).

someone must've forgotten to use buildx at comp then pushed and since we all had amd64 machines no one noticed

instructions can be found here

[majdkhalife]

Its done.
I can write out steps for people and add it in the wiki in case this would happen again? What do you think

[MrMondrian]

Yes I agree, its a really easy mistake to make. Most peoples instincts is to either run docker build or docker compose build but neither invoke buildx

[MrMondrian]

It might be possible to get docker compose build to cross compile by using the platform option https://github.com/compose-spec/compose-spec/blob/main/spec.md#platform and passing --builder as a command line arguments to docker compose build but not sure if this is possible or really all that useful