Release 0.4.0

.docker/Dockerfile

-FROM debian:10
+FROM debian:11
 RUN apt-get update && \
     apt-get install \
     curl \
@@ -13,7 +13,7 @@ RUN apt-get update && \
     tox \
     git \
     openjdk-11-jdk-headless \
-    python-autopep8 \
+    python3-autopep8 \
     python3-pytest \
     libxml2 \
     -y
@@ -25,7 +25,7 @@ ADD https://gitlab.com/api/v4/projects/13656973/repository/branches/dev \
 RUN git clone https://gitlab.com/caosdb/caosdb-pylib.git && \
    cd caosdb-pylib && git checkout dev && pip3 install .
 # At least recommonmark 0.6 required.
-RUN pip3 install recommonmark sphinx-rtd-theme
+RUN pip3 install -U html2text pycodestyle pylint recommonmark sphinx-rtd-theme
 COPY . /git
 RUN rm -r /git/.git \
     && mv /git/.docker/pycaosdb.ini /git/integrationtests