Update .gitlab-ci.yml

.gitlab-ci.yml

-image: alpine
-
 pages:
   script:
-  - apk --no-cache add py-pip python2-dev
-  - pip install sphinx sphinx_rtd_theme 
-  - apk --no-cache add make
+  - apk --no-cache add py-pip python-dev git make
+  - pip install sphinx guzzle_sphinx_theme recommonmark markdown m2r
+  - git clone https://github.com/Blendify/sphinx-bootstrap-directives.git
+  - cd sphinx-bootstrap-directives
+  - python setup.py build
+  - python setup.py install
+  - cd docs
+  - rm -Rf source
+  - cd ../..
   - make html
   - mv _build/html/ public/
   artifacts:
@@ -12,7 +16,6 @@ pages:
     - public
   only:
   - master
-
 compile_pdf:
   image: aergus/latex
   script: