Added launchpass to home page

Author: dangerworm

index.html

@@ -49,7 +49,9 @@ <h4>
     <div class="col-sm-9 col-md-10">
         <p class="intro-text">
             Want to dive right in? We usually have a few people connected to our
-            <a href="https://codewithpeople.slack.com">Slack workspace</a>, so come and speak to us there!
+            <a href="https://codewithpeople.slack.com">Slack workspace</a>, so come and speak to us
+            there. If you're not signed up, you can
+            <a href="https://launchpass.com/codewithpeople">join our Slack here</a>.
         </p>
     </div>
 </div>