Docker: poetry install

[rhizoome]

In document merge service I used

RUN poetry config virtualenvs.create false \
  && poetry install $([ "$ENV" = "dev" ] || echo "--no-dev") --no-interaction --no-ansi

to install into docker. A project using the container currently expects that caluma is installed like that. This also allows to use database drivers provided by the system, instead of compiling them during install.

If we use the current way, all downstream projects have to add poetry run everywhere.