So I recently migrated a server from discoursehosting.com to DO.
There is one issue on the new instance, the previous server had the a folder called db1234 (4 digit numerical value) in the var/discourse/shared/standalone/uploads/ folder.
The new server (docker install) uses a folder called ‘default’ in the var/discourse/shared/standalone/uploads/ folder.
The images and user uploads all load correctly, from both folders now. New uploads going to the default folder and old uploads still working from the db1234 folder.
When I do site backup via the admin panel (including files) however. It only includes the default folder and the db1234 folder is excluded. Not sure if this is fair to call it a bug, I think it would make sense to include all the contents of the uploads folder though.