Add a cli interface to choose a configuration (#163)

- [x] add a cli to the webserver to take env variables into account 
- [x] add a cli to the data processing that takes enviromental variable
as a valid source into account
- [x] rework the cli for the reset sql command
- [x] rework the cli for the copying of sql data from one db to another

Dockerfile

@@ -27,4 +27,5 @@ FROM base as web-server
 RUN pip install --find-links=dist aki-prj23-transparenzregister[web-server] --no-cache-dir && \
     rm dist/ -R
 
-CMD python -m aki_prj23_transparenzregister.ui.company_finance_dash
+ENTRYPOINT ["webserver", "ENV"]
+CMD ["--level", "DEBUG"]