Build the docs in CI

test for errors or warnings

.gitlab-ci.yml

@@ -38,6 +38,17 @@ python35:
   variables:
     PYTHON_VERSION: py35
 
+docs:
+  image: python:3.5
+  before_script:
+    # install django deps
+    - pip install -r requirements.txt
+    - cd docs
+    # install doc deps
+    - pip install -r requirements.txt
+  script:
+    - test -z "$(env -u GITLAB_CI make html | egrep -w 'SEVERE:|ERROR:')"
+
 cache:
   key: "$CI_BUILD_NAME"
   paths: