JDC is not logging any error on wrong TP configuration

[GitGab19]

JDC is not generating errors when a wrong TP configuration is used.
To reproduce it, you can simply change the port number randomly in tp_address parameter, and run it.
A discussion about this here: https://discord.com/channels/950687892169195530/1012371967992672321/1229368703737663508

[Sjors]

Worse, it's not logging any config error (it took me half an hour to realise I had to rename authority_public_key to authority_pubkey).

It does log when the config file doesn't exist.

[GitGab19]

I would label this as a good-first-issue.
Maybe I don't remember correctly, but didn't we do something in the past to fix these type of behaviours @plebhash ?