1. Install Webserver, google: XAMPP (for Windows user) / LAMPP (Linux user)
2. After installation complete, create a folder with name "bts" inside htdocs folder (go to XAMPP/LAMPP installation folder, default path C:\xampp\htdocs)
3. extract the code that you've downloaded to that bts folder
4. Open browser (chrome, firefox, etc) then go to URL localhost/bts