Running a Nodejs app

When we run a start JS script for a Nodejs app, will the app keep running forever until we click stop or will it pause after we log out of cPanel?

I have a Nodejs app running for my current website on Ghost blogging platform.

I noticed that an hour or two when I logged back into my cPanel, the website showed something like “Site is starting up. Check back again…”.

And the Number of Processes was 0/100 before & 11/100 after it started up. It is very weird.