Tried Paperless-ngx and gotta say I like it so far: https://docs.paperless-ngx.com/

I was especially happy when I found the Paperless apps in the #fdroid store. That’s always a good sign 🤓

PaperlessNGX is a community-supported open-source document management system that transforms your physical documents into a searchable online archive so you can keep, well, less paper.