It’d be great to have possibility to make Volumio sends syslog (if it creates any) to remote server for debugging purposes.
Current 2.246 misbehaves on my RPi, and I don’t know why it crashes. Having logs remotely would help.
Why not using SSH to connect your device and sudo journalctl -f (or what you need) monitor it ?
Please read the doc to enable SSH. (Bottom of the page)