Implement/test CLI-application

added To do label

assigned to @nicklapt

added In progress label and removed To do label

created branch 12-implement-test-cli-application to address this issue

created branch 12-implement-test-cli-application-2 to address this issue

mentioned in merge request !15

created branch 12-implement-test-cli-application-3 to address this issue

mentioned in merge request !16 (merged)

mentioned in commit 88e28ba2

closed with merge request !16 (merged)