- drag and drop files (not uploading them needs to be fixed)
- Not showing files when they upload
- files to be downloadable
- Cron job to delete files.

TODO:
- For conversion to .net6: Only program.cs remove startup. Change to file scope namespaces, check again for dependencies
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- For app: - front dizajn
           - fajlovi da se uploaduju
           - job za fajlove