Tested on: Ubuntu 22.04 LTS
Docker Version: 28.1.1
Docker Buildx Version: v0.23.0

Documentation: Multi-platform Builds

# check if buildx is installed
docker buildx version

# installing and registering QEMU
docker run --privileged --rm tonistiigi/binfmt --install all

# create new build that runs in docker container
docker buildx create --name mybuilder --driver docker-container

# switching to our builder
docker buildx use mybuilder

# build and pushing image directly to image store (make sure you are logged in)
docker buildx build --platform linux/amd64,linux/arm64 -t <username>/<image_name>:<tag> . --push