updated gitlab ci file to server static file and static app files

image: alpine:latest

image: node:20

pages:

  stage: deploy

  script:

    # Copy static site content

    - mkdir -p public

    - cp -r page/* public/

    # Build React app

    - cd react-frontend/my-react-app

    - npm install

    - npm run build

    # Copy React build to /blog

    - mkdir -p ../../public/blog

    - cp -r build/* ../../public/blog/

  artifacts:

    paths:

      - public