build steps. steps: - name: 'gcr.io/cloud-builders/go' args: - 'install' - 'hello' env: - 'PROJECT_ROOT=hello' - name: 'gcr.io/cloud-builders/docker' args: - 'build' - '-t' - 'gcr.io/$PROJECT_ID/$REPO_NAME:$COMMIT_SHA-$BUILD_ID' - ‘.' - - snip - - images: [‘gcr.io/$PROJECT_ID/$REPO_NAME']