Fix VPN disonnection / automation

[SteffenRenisch]

For some partners, there is a disconnect from the VPN occurring after 25 hours.

[Ultimate-Storm]

https://github.com/KatherLab/MediSwarm/blob/main/assets/openvpn_always_on_setup_guide.md

[SteffenRenisch]

• Jeff tested on three sl servers
• Request a test from CAM site.
• Everyone tested this

[Ultimate-Storm]

reopen if re-occur on CAM