NodeBB, like any enterprise application, is a bit complicated. This is not a static page that you are trying to host. What you did @ALiveVam wouldn't even work for a static set of pages, let alone a dynamic application. You are lacking a viable web server (IIS and Windows aren't going to cut it here, at least not in any reasonable way, and they'd be crazy to use no matter what), you don't have the NodeJS platform involved, you don't have a database, you haven't configured the application, etc. Lots of missing parts, all of them, in fact.
I don't normally jump to this, but the number of basics being missed here tells us that you will need to hire someone to run your hosting for you. This doesn't have to be expensive if your needs are quite basic, but you do need an IT team who understands applications, databases, web servers, etc. Running something like NodeBB isn't hard, but is much harder than running something like WordPress, which is also a dramatic number of steps past where you are.