What do I need to backup in order to be able to recover in case my node dies and the server catches fire 🔥?

[FeatureSpitter]

Backing up a LN node seems complex.

And I was wondering... Besides copying the .lnd folder and its contents, if I activate Postgres as a database, would backing up the database alone be enough? Or I still need the .lnd folder?

Thanks

[guggero]

See the lnd Operational Safety Guidelines document.
It was written before Postgres was a thing, but in general, the Postgres DB contains the data that otherwise would be in wallet.db, macaroons.db and channel.db.

Backing up the DB is always a good idea. But restoring it from a backup that is not the absolute very last state (which is almost impossible to know) can be dangerous (see explanation in linked doc above).