Email notifications for users giving wrong URL

We are running GitLab on top of Turnkey Linux and got everything set up and running relatively easily. However, when we add any new user, the email sent to them to confirm their account does contain the correct URL.

The link on the email goes to “http://core/users/password/edit?reset_password_token...etc” when instead it should be pointing to “http://[our domain name]/users/password/edit?reset_password_token…etc”. I cant find any settings for this in the web UI, so I’m assuming there’s a config file for this somewhere, but we’ve changed the hostname in all the places we could think to look. Does anyone have an idea of what’s causing this or know where the config file for this would be located?