composer config repositories.REPOSITORY_NAME composer REPOSITORY_URL
composer require phidias/calendar.api
Edit the file public/index.php
and call Server::import (before Server::run)
Server::import("../vendor/phidias/calendar.api");
Look at all files inside the /configuration folder and edit as necessary
cd path/to/your/project/public (or wherever index.php resides) php ../vendor/phidias/api/scripts/install.php
Make the /public directory available through a web server
Quick test: cd path/to/your/project/public php -S localhost:8000