If you upload a document Documents or Resources page, you get a download link for the document that you can embed elsewhere in your app.

To get the download link, navigate to the page with the document in the editor. On the right, you can see your list of documents. Tap on the three dots next to the desired document:

Then right-click on the Download item and choose "Copy Link" to copy a download link to your clipboard.

You can then use the download link elsewhere in your app.