Install deps when building docs

.gitlab-ci.yml

@@ -3,6 +3,7 @@ image: python:3.8-alpine
 test:
   stage: test
   script:
+  - pip install -r requirements.txt
   - pip install -U sphinx sphinx-press-theme
   - sphinx-build -b html docs public
   rules:
@@ -11,6 +12,7 @@ test:
 pages:
   stage: deploy
   script:
+  - pip install -r requirements.txt
   - pip install -U sphinx sphinx-press-theme
   - sphinx-build -b html docs public
   artifacts: