Finalize 1-click-deployment in ".gitlab-ci.yml" (!46) · Merge requests · vadere / vadere

Update README.md: Use absolute URLs (because `README.md" will be packaged into a Vadere release).
Update CHANGELOG.md: Describe 1-click-deployment conciser.
Update gitlab-ci.yml: Add README.md to a Vadere release and use template .template_deploy_stable_automatically (when setting a Git tag).

Finalize 1-click-deployment in ".gitlab-ci.yml"