Issue Node JS App Running on Other ports as well

[lukegalea16]

I've written a simple test Node JS app which serves a webpage on port 3000 only. This worked fine locally i.e. page is served on localhost:3000 and not localhost:80 for example. However upon uploading this to my subdomain on Plesk and Enabling the Node JS application, the page is served on port 80 (default port) as well. What could the issue be?

 

[MarioSmith91]

I would also like to know why he does this

 

[MarioSmith91]

There is not a shred of documentation on how Plesk with Apache and Nginx web servers make node work