Access private folder on galaxy?

I’m trying to load up some data on startup from the private folder, which is working locally but I can’t find it after the build and deploy to galaxy. This is working locally but not sure what I need for it to work on galaxy:

let path = process.env.PWD +'/private';

found this:

You can use assets/app/ as the relative path. While this may not make sense on the first look Meteor re-arranges your /private directory to map to assets/app from the /programs/server directory. This is both in development and production.

Basically assume that private/ maps to assets/app/.