Ember instance initializer

I have following questions regarding using Ember instance initializer inside an addon/engine;

1. Is there a naming convention to be followed for the instance initializer ?
2. At what point of time exactly is the instance initializer executed (when doing local ember build / ember server) ?
3. How can we debug or see values within the instance initializer ? (e.g. if I have code whoch checks appInstance.mountPoint, how do I print/see it's value within the debug/logs) ?