still temp (since #57) until 0.13+ is default for docker desktop

Author: solsson

README.md

@@ -120,7 +120,7 @@ if [[ ! -z "$YSTACK_GIT_COMMIT" ]]; then
     YSTACK_GIT_COMMIT="$YSTACK_GIT_COMMIT-dirty"
   fi
 fi
-docker buildx create --use --driver-opt image=moby/buildkit:v0.13.1
+docker buildx create --name=ystack --platform=linux/amd64,linux/arm64/v8 --use --driver-opt image=moby/buildkit:v0.13.1
 SOURCE_DATE_EPOCH=0 docker buildx build --progress=plain --platform=linux/amd64,linux/arm64/v8 --output type=image,name=yolean/ystack-runner:$YSTACK_GIT_COMMIT,rewrite-timestamp=true,push=false -f runner.Dockerfile .
 ```