title: discord.js bot replies to itself
body: <p>I am currently coding my first discord bot, it can already play YouTube music.</p>
  
  <pre class="lang-javascript prettyprint-override"><code>if (message.content.includes("Good Job") || 
      message.content.includes("good job")) {
      message.channel.sendMessage("Good Job everyone :smirk:");
  }
  </code></pre>
  
  <p>As you see, if someone types "good job" (this is just an example) then the bot will reply with "good job everyone :smirk:), but then the spam will begin: the bot reads his own message and replies to it.</p>
  
  <p>How can I prevent the bot from answering itself?</p>