You can do this simply by:
Or by hand by:
docker-compose up -d
Log files are stored in the logs folder under the pi-server (docker). You can follow them by tail -f <logfile>.
If you want closer details what a specific team was doing check out data/authserver/actionlogs
All data and settings from the teams will be saved in the data folder. This data persists over updates.
Make sure you do regularly backups of the data folder.
See 2.6.0 Update from an earlier version to this version