In the system administration it is possible to manage the files in cattaDoc remotely, including uploading new files. Provided, however, that a web-based file manager is installed and enabled in cattaDoc.
The file manager used in cattaDoc is simogeo/Filemanager, ref.: github.com/simogeo/Filemanager.
The file manager is included in the full download package of cattaDoc, but not in the cattaDoc only package. In the last package only the interface file to the file manager is included, including a sample file manager configuration file.
The only way to manage the file manager is through its configuration file. Please refer to the Filemanager wiki for configuration changes. The use of a web-based file manager opens up for a number of security risks. Be careful therefore when setting up the file manager. The wiki includes advices on how to do it.
The use of the file manager in cattaDoc is optional. cattaDoc will work without the file manager, but remote file management will of course not be possible without a file manager.
All files and folders to be administered remotely with the file manager should be made writable for cattaDoc.