Just using Nodebb not a long time.

1. Backup is not convenient currently and you can't do what you say for now.
2. Yes, just install the plugin.
3. Installing NodeBB on the Cloud
4. Nodebb installation is easy and fast more than Discourse, you don't have to build a Docker image.
5. I have not an upgrade yet, newest version I was installed. Also, you can go https://docs.nodebb.org/configuring/upgrade/
6. Third part Email service is optional and you easy to config email on Nodebb.

The service worker request not found, the url like
https://www.example.com/service-worker-b3132ce44c958878a3dc19776072ad3861a661ca983e3c8f0269c27a439d47d2.js

I tried to rebuild and restart nodebb but not fix. It's that a problem?