Store API tokens encrypted in the database.
During the database migration a randomly generated key will be used encrypt the tokens if no ENCRYPTION_KEY environment variable was provided.
If the application is started without the presence of an ENCRYPTION_KEY (or if the key failed to decrypt the existing tokens), the UI will display a warning with further instructions.
* Create freebsd.md
Basic instruction how to install Teslamate on FreeBSD
* Small adjustments necessary for FreeBSD reflected
* Add empty line before closing tag
* Add FreeBSD guide to the sidebar
* Move FreeBSD upgrade instruction into separate tab
Co-authored-by: Adrian Kumpf <8999358+adriankumpf@users.noreply.github.com>