How do I set up the keepass mini app for iphone to sync with dropbox?

Question

iPhone

How do I set up the keepass mini app for iphone to sync with dropbox?
This can be done by simply manually exporting the kdbx file to any network storage, but this is the solution.
If I lose my phone or want to change it to andoid, then some of the information with keepass will still be lost, because the file is not exported so often