added testing code

bot.rb

@@ -0,0 +1,12 @@
+#!/bin/env ruby
+
+require 'discordrb'
+
+token = File.read("./token")
+bot = Discordrb::bot.new token: token
+
+bot.message(with_text: 'Ping!') do |event|
+    event.respond 'Pong!'
+  end
+  
+bot.run