Download it and extract the file. Put the scripts to the 'www' or 'htdocs' directory. Create a database. Import the 'search_engine.sql' file to your database. Go to config folder and open 'config.php' ...
This repository contains the core fengari code (which is a port of the Lua C library) which includes parser, virtual machine and base libraries. However it is rare to use this repository directly.