trying to improve online docs rendering

.gitlab-ci.yml

@@ -3,7 +3,7 @@ image: alpine:3.13.5
 test:
   stage: test
   script:
-  - apk add --no-cache build_essential
+  - apk add --no-cache build-base
   - pip install -U -r requirements.txt
   - python setup.py install
   - sphinx-build -b html docs/source public
@@ -15,7 +15,7 @@ test:
 pages:
   stage: deploy
   script:
-  - apk add --no-cache build_essential
+  - apk add --no-cache build-base
   - pip install -U -r requirements.txt
   - python setup.py install
   - sphinx-build -b html docs/source public