build PDF documentation from README.md [gitlab]

.gitlab-ci.yml

build_doc: 
  stage: build
  image: pandoc/latex:2.9.2
  script:
    - echo "---" >> headers.md
    - "echo 'title: '${CI_PROJECT_TITLE} >> headers.md"
    - "echo 'date: '$(date +'%m/%d/%Y') >> headers.md"
    - "echo 'header-includes: |' >> headers.md"
    - echo "    \usepackage{fancyhdr}" >> headers.md
    - echo "    \pagestyle{fancy}" >> headers.md
    - echo "    \fancyhead[RO,RE]{${CI_PROJECT_URL}}" >> headers.md
    - echo "    \fancyfoot[CO,CE]{\thepage}" >> headers.md
    - echo "    \fancyfoot[LE,LO]{last updt:${GITLAB_USER_EMAIL}}" >> headers.md
    - echo "    \fancyfoot[RE,RO]{commit:${CI_COMMIT_SHORT_SHA}}" >> headers.md
    - echo "---" >> headers.md
    - cat headers.md
    - cat README.md >> headers.md
    - cat headers.md
    - pandoc headers.md -f markdown+smart --variable mainfont=Roboto --variable wrap=preserve --variable lang=fr-FR --variable fontsize=11pt --variable geometry:margin=1.5cm --pdf-engine=pdflatex --toc -o ${CI_PROJECT_NAME}_doc.pdf
  artifacts:
    paths: 
      - ./${CI_PROJECT_NAME}_doc.pdf
  tags:
    - docker