Multiple builders using docker buildx use

[trajano]

I recently got the remote builder over SSH working with #4268 (comment)

I was wondering if it is possible to set up multiple builders using a command like

docker buildx use builder1 builder2 builder3

[trajano]

Just need to use --append

docker buildx create --name mybuilder \
   --driver docker-container \
   --platform linux/amd64 \
   --use \
   --bootstrap \
   --config "$PWD/buildkitd.toml" \
   ssh://mybuilder0

docker buildx create --name mybuilder \
   --driver docker-container \
   --platform linux/amd64 \
   --append \
   --use \
   --bootstrap \
   --config "$PWD/buildkitd.toml" \
   ssh://mybuilder1