It's self hosted, so both parts are up to you.
Of course you could setup TLS and FDE but this doesn't guarantee that your data will be safe.
Likewise setting up FDE means your data is encrypted on the server.
> but this doesn't guarantee that your data will be safe
I don't get what you're trying to get at here. If you're taking about bugs compromising the encryption then I guess this applies to practically every software out there making this a moot discussion.