TODO: Remove force-branch line

Separated building and deploying in the Gitlab CI

See merge request !4

As forked projects don't have the permissions to access the
deployment runner, these cannot run the deployment job.
Therefore the build was splitted into two stages, where everyone
can run the build stage, as this only needs a docker compatible runner.

Fix grammatical errors on FAQ page

See merge request !2

Textkorrekturen

See merge request !3