[CI] improve documentation generation

.gitlab-ci.yml

@@ -60,15 +60,15 @@ linux_docker:
     - source $VENV_DIR/bin/activate
     - pip install --upgrade pip
     - pip install sphinx cloud_sptheme nbsphinx recommonmark numpy
+    - rm -rf artifacts
+    - rm -rf public
+    - mkdir artifacts
   script:
-    - cd doc
-    - make html
-    - cd ..
-    - mkdir public
-    - cp -rv doc/_build/html/* public/
-  artifacts:
-    paths:
-      - public
+    - python setup.py build build_sphinx -b html
+    - mv build/sphinx/html artifacts/doc
+    - mv artifacts/doc public
+  after_script:
+    - ls -Rl public
 
 
 pages_shell:
@@ -81,3 +81,4 @@ pages_shell:
   artifacts:
     paths:
     - public
+    expire_in: 2h