The SIFO App is the starting point to create your own SIFO application.
After cloning this repo, you'll need to have composer installed in your system. If you have never installed it then:
$ curl -sS https://getcomposer.org/installer | php
$ mv composer.phar /usr/local/bin/composer
Once composer is installed you should be able to run composer. Invoking the install will download all necessary packages:
$ composer install
After the command everything should be installed (you will see a vendor folder now).
Your own application should be created inside the instances folder, see others for understanding structure.