* `services` an array of services to setup (default to [])
* `name` the name of the service to create for this app, mandatory
* `url` the url of the backend of the app, mandatory
+ * `upstream` if the url reference an upstream a dict with the configuration
+ * `conf` the configuration as expected by kong for an upstream creataion
+ * `targets` an array of dict defining a target for kong
+ * `target` the host:port to reach the target
+ * `weight` the weight of the target
* `plugins` An array of plugins to activate with their name and config in a dict
* `name`
* `config`