Domoticz goes offline - how to save log

[gurushastri]

Hi,
I have a Raspi running domoticz that's connected to a couple of sonoffs. thats it.
however, every few hours (up to a day or so) my domoticz goes offline without apparent reason. since its offline i can't see the log and figure out why its disconnecting.
I can't seem to find a proper log file or even how to activate one.

is there a way of saving the log on my smartphone (which runs domoticz app?) or maybe, so it could be live, to send it via telegram?
thanks.