Assuming Ubuntu 16.04 and root user:
cd path/to/dir
git clone https://github.com/establishment/daedalus
cd Daedalus
./install.sh
The Daedalus code is released explicitly under public domain (AKA The Unlicence, I just like public domain more than the term "Unlicence"). There are no ugly copyright headers you need to keep, and you can copy/paste the code without any attribution. It make it easier to bundle your code, so you know a minimized production js can strip all comments away. In case you need extra assurance, this software is also licenced under Creative Commons 0, you can pick your preferred licence.