At Cloudron.io, we are making a platform for self-hosting web apps. We have packaged NodeBB for the Cloudron - https://cloudron.io/button.html?app=org.nodebb.cloudronapp.
You can see a demo at https://my-demo.cloudron.me (username: cloudron password: cloudron) . You can install nodeBB from the App Store menu item. If you are a developer and would like to help contributing to the app, you can find the source code here - https://github.com/cloudron-io/nodebb-app/.
Let me know if you have any questions.