use the poetry to build docs.

.gitlab-ci.yml

@@ -39,10 +39,9 @@ pages:
     - linux
   stage: deploy
   script:
-    - apt update && apt install -y graphviz
-    - python3 -m pip install sphinx
-    - python3 -m pip install -r docs/requirements.txt
-    - sphinx-build -b html docs/source public
+    - apt update && apt install -y graphviz make
+    - python3 -m pip install poetry
+    - make docs && cp -r docs/build/html public
   artifacts:
     paths:
       - public