CI build mkdocs and push to s3

# variables in gitlab:

#   S3_BUCKET_NAME

#   S3_BUCKET_SUBDIR

#   AWS_ACCESS_KEY_ID

#   AWS_SECRET_ACCESS_KET

#   AWS_DEFAULT_REGION

stages:

  - build

  - deploy

"Build MkDocs":

  image: "python:3"

  stage: build

  only:

    - main

  before_script:

    - pip install -r requirements.txt

  script: 

    - mkdocs build

  artifacts:

    paths:

      - site/

"Sync with S3":

  image: "python:3"

  stage: deploy

  dependencies:

    - "Build MkDocs"

  only: 

    - main

  before_script:

    - pip install awscli

    - aws --version

  script: 

    - aws s3 sync site/ s3://${S3_BUCKET_NAME}/${S3_BUCKET_SUBDIR} --delete

  environment:

    name: Site

    url: http://${S3_BUCKET_NAME}.s3-website.${AWS_DEFAULT_REGION}.amazonaws.com/${S3_BUCKET_SUBDIR}

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