Update openVPN certificates and deploy to devices

[jellyfish-bot]

[fisehara] Basically the certificates are initiliased during openBalena quickstart command. But there is no way in openBalena to update those certificates on the devices itself.

Temporary Solution:

• Manually create new certificates before deploying them in the openBalena deployment.
• Manually copy certificates on devices into /etc/openvpn certificates folder with existing VPN connection. Caution: Don't overwrite existing certs.
• Deploy new certs to openBalena deployment.

[bartversluijs]

Any suggestions / commands to manually update the certificates?