Multi-architecture devtainers can be launched by installing qemu-user-static.
On a Debian Dockside host, it can be installed using:
sudo apt-get update && \
sudo apt-get -y install qemu binfmt-support qemu-user-static && \
docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
You can test you have installed qemu-user-static correctly, by launching a devtainer from the Debian profile, and selecting either the
arm32v7/debian,arm64v8/debian,mips64le/debian,ppc64le/debianors390x/debianimage.