You'll need windows server, or windows pro for this, so that you have IIS. I'm running Windows 10 Pro.
Move your BBS's Web settings to bind on port 8000 (or any internal port you choose).
Install Application Request Routing (ARR)
Add your BBS's web/root directory to a new website in IIS, you must specify a host name, you can add additional host names under bindings.
My web.config file below, this file should also go into your web/root. You'll need to replace localhost:8000 with the appropriate port you are using. You sould also replace the www\.roughneckbbs\.com and www.roughneckbbs.com references with your host name.