Make examples MWE

[cab938]

For our examples we should try and keep them as minimal as possible. So for the docker example, this file has lots of "extra" database stuff I think should be nuked, and just instead indicate what the five or six lines we need are:

https://github.com/educational-technology-collective/jupyterlab-pioneer/blob/main/configuration_examples/compose.yaml

I think an extra comment before each line in this file would be good too:

https://github.com/educational-technology-collective/jupyterlab-pioneer/issues/new

Also, if you change the pip command:

RUN python3.11 -m pip install --no-cache-dir --upgrade pip \
    && python3.11 -m pip install -U setuptools \
    && python3.11 -m pip install jupyterlab jupyterlab-pioneer==0.1.2

to

RUN python3.11 -m pip install --no-cache-dir --upgrade pip \
    && python3.11 -m pip install -U setuptools \
    && python3.11 -m pip install jupyterlab \
    && python3.11 -m pip install -U jupyterlab-pioneer

You should always get the latest version of the extension in place