[ ] export CSV/excel/markdown for printing
[ ] improve handling of settings for prod, test, and dev: avoid all those if statements
[ ] set up logging properly
[ ] set up a dev env using docker or docker-compose
[ ] perhaps even provide a Vagrantfile and ansible playbooks to deploy the app in a VM

done:
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[x] export data
[x] import exported data
[x] display Teil-number
[x] split requirements into prod, test, dev