I already post about this issue back in October 2023 to maintainer's e-mail and to ports@, but without any reply.

I noticed the change of config file location. It was previously in local/etc/rc.conf.d/vaultwarden (and I still have this file)
But according to this https://reviews.freebsd.org/D41602 new install location is local/www/data/config.json.sample so I looked in to this file and it is totally different than local/www/data/config.json. 
The later is real JSON file, but config.json.sample is not a JSON file at all so why it is named like it? 
(this is the source of the sample file https://cgit.freebsd.org/ports/tree/security/vaultwarden/files/vaultwarden_conf.in) 

Beginning of the config.json:
------------------
{
  "domain": "http://localhost/vaultwarden/",
  "sends_allowed": true,
  "incomplete_2fa_time_limit": 3,
  "disable_icon_download": false,
  "signups_allowed": false,
  "signups_verify": false,
  "signups_verify_resend_time": 3600,
  "signups_verify_resend_limit": 6,
------------------

Beginning config.json.sample:
------------------
#Warning : Some of these settings may be overridden when changing settings on the admin page or in the config.json file
#located by default at: /usr/local/www/vaulwarden/data/config.json

ROCKET_ADDRESS=127.0.0.1
export ROCKET_ADDRESS

ROCKET_PORT=4567 # your port here
export ROCKET_PORT
------------------

Note, there is also a typo in a commented path "vaulwarden" instead of "vaultwarden"


What is the right way to configure vaultwarden now?