Applications on startup - plank dock

Good afternoon, I’m trying to find how to add Plank Dock when the operating system starts but I can’t find, as in other cases, graphic applications to add what I want. Could you tell me how to do it?

There you go.

Just add the program at the end of that file.

Regards.

Just copy plank.desktop file to ~/.config/autostart

cp /usr/share/applications/plank.desktop ~/.config/autostart/