adding a gitlab pages pipeline

pages:

  stage: build

# The Docker image that will be used to build your app

image: python:3.11-slim

pages:

  script:

    - pip3 install sphinx sphinx-rtd-theme

    - sphinx-build --color -W -a -v -b html source public

  artifacts:

    paths:

      # The folder that contains the files to be exposed at the Page URL

      - public

  rules:

    # This ensures that only pushes to the default branch will trigger

    # a pages deploy

    - if: $CI_COMMIT_REF_NAME == $CI_DEFAULT_BRANCH