Fix issues in Firefly - use DB version, fix upload and export mounts, use "version-5.7.12" as verison
The biggest fix are export and upload mounts. They were broken so all uploaded receipts went in vain. The new path seems correct, as I can see new files after uploading the receipts.
Compose file uses DB version, which is defined in additional config file.
Instead of Firefly's latest
version, use version-5.7.12
.