* Initial implementation of upload files api.
* Move sanitize method to utils.
* Save uploaded data to uploads folder.
* Avoid loop if we do not have a purpose.
* Minor cleanup of api and fix bug where deleting duplicate filename cause error.
* Revert defer of saving config
* Moved creation of directory to startup.
* Make file names unique when storing on disk.
* Add test for files api.
* Update dependencies.
