buildx to ECR

build.sh

$ docker context create build
$ docker buildx create --use build --driver=docker-container
$ docker buildx build \
  --cache-to type=gha,token=${{ secrets.GITHUB_TOKEN }} \
  --cache-from type=gha,token=${{ secrets.GITHUB_TOKEN }} \
  --platform=linux/amd64,linux/arm64 \
  --build-arg TERRAGRUNT_VERSION=${{ env.TERRAGRUNT_VERSION }} \
  --build-arg TERRAFORM_VERSION=${{ env.TERRAFORM_VERSION }} \
  -t $REGISTRY/$REPOSITORY_AND_TAG \
  -f container-images/$DOCKERFILE \
  --push \
  container-images

Just a random example that came up on SweetOps office hours