DOC: An easier mounting method with devise (#112)

README.md

@@ -100,6 +100,16 @@ The reason this doesn't happen in rails apps is because ActiveSupport has a monk
   end
 ```
 
+### Mount using devise (method 2)
+Change :admin_user symbol with your devise user, example :user.
+In -> lambda block change admin? method with your authorization method
+Or simply define a admin? method in you user model.
+```
+  authenticate :admin_user, ->(u) { u.admin? } do
+    mount Logster::Web, at: "/logs"
+  end
+```
+
 Out of the box, logster will use the default redis connection, to customise, in `config/application.rb`
 
 ```