You've not made it clear what exactly it is you want. Nextcloud or syncthing are good for syncing personal files. If you want to make server backups, they're not gonna be the way.
If you want to automate backups, you could just use a cronjob to make a tarball and rsync it?
Agreed. I don't find it misleading; it's showing a gui frontend, which makes more sense for a screenshot as it's a more interesting screenshot than a screenshot of your terminal.