Deploy to gitlab - vitepress: not found

[XinleZhou2018]

Describe the bug

When I commit my code to gitlab, it says: vitepress: not found

this is my .gitlab-ci.yml

image: node:18
pages:
  cache:
    paths:
      - node_modules/
  script:
    # - apk add git # 如果你使用的是像 alpine 这样的小型 docker 镜像，并且启用了 lastUpdated，请取消注释
    - npm install
    - npm run docs:build
  artifacts:
    paths:
      - public
  only:
    - main

why? is it because gitlab pages setting error? how to set?

Reproduction

see above

Expected behavior

see above

System Info

see above

Additional context

No response

Validations

• Check if you're on the latest VitePress version.
• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.

[brc-dd]

I don't think you have vitepress listed in your package.json. That packages installed count in npm should be much more. Had you run npm add -D vitepress in your project?