Offer docker images for all builded architectures

[smuu]

You build your rcon-cli for different architectures. You could also build docker images for all of those architecture. Or at least start with: linux_armv7, linux_arm64 and linux_386.

[itzg]

Multi-architecture docker image builds are surprisingly hard to do via Docker Hub and CI in generally, but I'll try to research what can be done with goreleaser in the mix.

It's a large image for this solution, but as a workaround you can use:

docker run --rm --entrypoint rcon-cli itzg/minecraft-server:multiarch