DHCP failed with systemctl message

Guys? How is there no support? I spent all day finding out that the isc-dhcp-server package isn’t pre-included. Like what? no wonder volumio doesn’t work out of the box like it should. If I use apt-get update command then it is able to find the dhcp server package. But I read it will break the system if we do an update like that. If I don’t use the update then it won’t find the dhcp package at all. How do you fix this?