code: func emptyImageConfig() ([]byte, error) {
  	img := ocispec.Image{
  		Architecture: runtime.GOARCH,
  		OS:           runtime.GOOS,
  	}
  	img.RootFS.Type = "layers"
  	img.Config.WorkingDir = "/"
  	img.Config.Env = []string{"PATH=" + system.DefaultPathEnv}
  	dt, err := json.Marshal(img)
  	return dt, errors.Wrap(err, "failed to create empty image config")
  }
docs: // const (
  // 	emptyGZLayer = digest.Digest("sha256:4f4fb700ef54461cfa02571ae0db9a0dc1e0cdb5577484a6d75e68dc38e8acc1")
  // )