Cherrypicked changes from: 3782c13e Building API documentation.

.docker/Dockerfile

@@ -7,8 +7,10 @@ RUN apt-get update && \
     python3-autopep8 \
     python3-pip \
     python3-pytest \
+    python3-sphinx \
     tox \
     -y
+RUN pip3 install recommonmark sphinx-rtd-theme
 COPY .docker/wait-for-it.sh /wait-for-it.sh
 ARG PYLIB
 ADD https://gitlab.indiscale.com/api/v4/projects/97/repository/commits/${PYLIB} \

.gitlab-ci.yml

@@ -296,8 +296,9 @@ style:
 pages_prepare: &pages_prepare
   tags: [ cached-dind ]
   stage: deploy
-  needs: []
-  image: $CI_REGISTRY/caosdb/src/caosdb-pylib/testenv:latest
+  needs:
+    - job: build-testenv
+  image: $CI_REGISTRY_IMAGE
   only:
     refs:
       - /^release-.*$/i