Setup Workers Similar to how it's done on Heroku?

Hi, I’m just migrating my Node JS app from Heroku and I’m struggling to find anything around how to set up workers for queues on the App Platform as we do on Heroku.

Ideally, I know I’m to run the worker file on the same server instance e.g node worker/index.js along with the server itself but I can’t seem to find any documentation around this.

With Heroku, I can create workers by simply declaring it in a Proc file but I am unsure of how to go about it on App Platform.

Can anyone point me in the right direction?