RocketFirm Yii2 Engine - is a core of websites, created in RocketFirm
Installation should be automatically done, when you run
composer install command (get composer)
within Rocket site template.
Another way to install RocketEngine is to require this package from console
$ composer require rocketfirm/engine
Configure your database and run this package's migrations, before running your project's migrations
$ php yii migrate --migrationPath=@vendor/rocketfirm/engine/migrations