added bmbf logo and improved pipeline with tests for default values

2 jobs for master in 29 seconds (queued for 1 second)
Name Stage Failure
failed
pages-test Test
From https://transfer.hft-stuttgart.de/gitlab/templates/template_gitlab_page
* [new ref] refs/pipelines/923 -> refs/pipelines/923
* [new branch] master -> origin/master
Checking out 8fe902fd as master...

Skipping Git submodules setup
$ (! grep 'projektname= ""' public/settings.js)
let projektname= ""
ERROR: Job failed: exit code 1