I think you need change theme templates, this file: node_modules/nodebb-theme-persona/templates/header.tpl
But you need realize, in this case updates to new versions may be more painfull.
So earlier nodebb wasn't working properly and I saw that redis wasn't running. I immediatley did
redis-server and then i did 1
./nodebb setupwent to my web address to see if it was still configured right. After that I head over to my site in chrome and see that everything is back to default and all posts & users were deleted. Basically, I want to know if it is possible to get my data back.
I found a fix. It was an error in nodebb. When I did
./nodebb setup I made a typo in the port.. oops .-.
Anyway its all good now.