feat: added the default password of the local cozy instance.

docs/ecolyo/technical/launch_local_application.md

@@ -49,7 +49,7 @@ Wait until the success message:
 > Everything is setup. Go to <http://ecolyo.cozy.tools:8080/>  
 > To exit, press ^C
 
-Once successful you can launch your local cozy with following url: [Cozy local url](http://cozy.tools:8080/)
+Once successful you can launch your local cozy with following url: [Cozy local url](http://cozy.tools:8080/). The password of this instance is set to _"cozy"_ by default.
 
 Local database can also be consulted at the following url: [Cozy local DB](http://localhost:5984/_utils/)