./install.sh
Also make sure /usr/games/fortune exists (for example, on Ubuntu nowadays you run sudo apt install fortune-mod in order to install it).
/usr/games/fortune
sudo apt install fortune-mod
/PATH/TO/makefortune.sh would generate /PATH/TO/fortune.rss.
/PATH/TO/makefortune.sh
/PATH/TO/fortune.rss
Tip: do this as a cron job, and make /PATH/TO/ accessible by web.
/PATH/TO/