Merge branch 'master' into 'master'

Fix documentation

See merge request !21

.gitlab-ci.yml

@@ -75,9 +75,10 @@ deploy_zenodo:
 
 pages:
     stage: deploy
-    image: python:3.7-alpine
+    image: ubuntu:latest
     script:
-      - pip install -r docs/doc_requirements.txt
+      - apt update --yes && apt install --yes pandoc pip
+      - pip install -U -r docs/doc_requirements.txt
       - sphinx-build -b html docs public
     artifacts:
       paths:

docs/doc_requirements.txt

-sphinx
+sphinx>=3
 nbsphinx
 sphinx_rtd_theme
 myst-parser
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