message: build(docs-infra): add option to run only the doc-gen
  This can save time when iterating by not
  regenerating the zips and embedded examples.
  PR Close
diff: "postcheck-env": "yarn aio-check-local",
  "payload-size": "scripts/payload.sh",
  "predocs": "yarn generate-stackblitz && yarn generate-zips",
  - "docs": "dgeni ./tools/transforms/angular.io-package",
  + "docs": "yarn docs-only",
  + "docs-only": "dgeni ./tools/transforms/angular.io-package",
  "docs-watch": "node tools/transforms/authors-package/watchr.js",
  "docs-lint": "eslint --ignore-path=\"tools/transforms/.eslintignore\" tools/transforms",
  "docs-test": "node tools/transforms/test.js",
  