+Setup configuration file `config/packages/myproject.yaml` with the following
+content available in `Resources/config/packages/rapsys_pack.yaml`:
+
+```yaml
+#Services configuration
+services:
+ #Register facebook event subscriber
+ Rapsys\PackBundle\Subscriber\FacebookSubscriber:
+ arguments: [ '@router', [ 'en', 'en_gb', 'en_us', 'fr', 'fr_fr' ] ]
+ tags: [ 'kernel.event_subscriber' ]
+ #Register facebook util service
+ rapsys_blog.facebook_util:
+ class: 'Rapsys\PackBundle\Util\FacebookUtil'
+ arguments: [ '@router', '%kernel.project_dir%/var/cache', '%rapsys_pack.path%', 'facebook', '%kernel.project_dir%/public/png/facebook.png' ]
+ public: true
+```
+