What is Yourls?
YOURLS stands for Your Own URL Shortener . It is a small set of PHP scripts that will allow you to run your own URL shortening service ( a la TinyURL or bitly).
More information: https://yourls.org
Yourls for Yunohost: https://github.com/YunoHost-Apps/yourls_ynh
Thank you @anmol :)
mast.datamol.org is one server in the network