@Kowlin Well I am not an experienced sysadmin but when I am about to install some software that I don't know about, I have a look around and learn about it, its security etc.
If you just want to install a nodebb and run it for your community then its better if you use one of the paid plans nodebb has on its site, rather than trying to play with an open source software and then complain that it doesn't work or your db got wiped out or whatever that is.
When you are using open source software, I think you should acknowledge that it might have bugs and issues that you'll need to figure out on your own (or with some help).
In general I strongly believe that nodebb is a great forum software, but I think it can't really be used by people that have no programming experience, or IT experience. Not at this point in time.
I've been a senior software engineer for more than 10 years and it even took me quite a while to get the grasp of it and install it and configure it in a more proper manner.
What I want to say in reality is, that if you can't understand that you need to set a firewall behind your DB, password your DB etc, you shouldn't been trying to use nodebb as your forum software but something else that is much easier to the non techy user, or buy a solution that comes preintalled by the nodebb team.