Ubuntu 18.04 Buat folder di Dock
For files :
https://askubuntu.com/questions/966740/how-do-i-pin-my-favorite-folders-in-ubuntu-dock-like-in-windows
For apps :
https://askubuntu.com/questions/1091972/how-do-i-create-app-folders-in-the-gnome-application-menu
Fancy Ferret