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' ...
If there are any features you'd like to see added, feel free to open an issue or send in a PR. Put your Steamworks install in your engine depot. This includes the upload token. If you have a larger ...