Index should be auto update

[SeverusYixin]

Currently the index of the data source is only loaded again on re-run, it would be great if in the future, after the docker is deployed, he could update it regularly/in real time to check that new data has been added after the event.

possible:

Real-time updating:

using a watchdog-like file-monitoring library to monitor resource directories and automatically re-index files when changes are detected.

Scheduled Reindexing:

with the help of APScheduler, e.g. every 10 mins/1 h/1 d/... update it

[haesleinhuepf]

Maybe once a day is enough.