up.sh always rebuilds images and container

[christophziegler]

Regardless of whether news has been loaded from the git repository or not, the script rebuilds all images and containers. This can lead to unintended behavior, if for example state info may get lost if not stored in docker volumes or State API.

The script should therefore check if the local repo is behind or diverged and git pull should be run, e.g. via git status -uno or using the solution presented in this thread. Containers and images should only be rebuild if pull has been run.

A workaround is to run docker-compose up instead of up.sh if the platform shall only be restarted and container rebuild is not nessecary.