I have just published Firefly III as an unstable app. Most of the packaging work was done by @thetomester13 . Thanks a lot, Tomer!
The app is integrated with Cloudron LDAP. It will become a stable app after we have some auto tests for updates.
IMPORTANT: This app is only available if you Cloudron has updated to 4.4.4. This is because this app requires OpenLDAP compatibility (which we have now added in 4.4.4). Until then, you can try on the demo cloudron.