docker-ownDynDNS-netcup/docker-build

Build it yourself

https://docs.docker.com/buildx/working-with-buildx/#work-with-builder-instances

# This creates a new builder instance with a single node based on your current configuration.
docker buildx create
# To list all available builders, use
docker buildx ls
# To switch between different builders, use
docker buildx use <name>
# After creating a new instance, you can delete it with
docker buildx rm <name>

Build it as a multi-platform image:

chmod +x build_and_push.sh
./build_and_push.sh