Update examples

examples/application-example/lib/foobar/application.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+require 'foobar/version'
+
+module Foobar
+  class Application < BunnyRun::Application
+    name 'foobar'
+    usage '<options> [<path>]'
+    version Foobar::VERSION
+
+    option :success_message, 'Message to log after success',
+           type: :string, default: ENV['MESSAGE']
+  end
+end