This is fixed on latest master/persona/vanilla.
I fixed the issue by adjusting notifications_list.tpl:
Email notification for watched topics is working, but the link in the email "Click here to read the full topic", links to Localhost, so it doesn't work. I can't tell if this is to be configured in NodeBB itself, or in the nginx config file for my forum url. Any hints?
@ljhardy it's in the NodeBB's config.json. Change the URL to point to your community.