add image

packages/slackbot-proxy/src/views/install-succeeded.ejs

@@ -12,6 +12,7 @@
       <h5>The steps required to configure GROWI Slack app</h5>
       <ol>
         <li>First, <code>/growi register</code> in any slack channel.</li>
+        <img src="https://docs.growi.org/assets/images/slack-bot-growi-register.png">
         <li>Looking for additional help? Try <code>/growi help</code></li>
       </ol>
       <p>Need more infomation? See Getting started.</p>