You can use these scripts to setup SetlX.js for contribution:
Clone this gist into a new folder:
git clone https://gist.github.com/f666bc027e6ed10af9f918d2008a6e12.git setlxjs
switch into the newly created directory:
cd setlxjs
run setup.sh
bash setup.sh
run link.sh as sudo user
sudo bash link.sh