Promote @freeCodeCamp in the welcome panel

assets/javascripts/templates/pages/root_tmpl.coffee.erb

@@ -42,6 +42,7 @@ app.templates.intro = """
       <li>DevDocs is free and <a href="https://github.com/Thibaut/devdocs">open source</a>.
           <iframe class="_github-btn" src="//ghbtns.com/github-btn.html?user=Thibaut&repo=devdocs&type=watch&count=true" allowtransparency="true" frameborder="0" scrolling="0" width="100" height="20"></iframe>
       <li>If you like the app, please consider supporting the project on <a href="https://gratipay.com/devdocs/">Gratipay</a>. Thanks!
+      <li>And if you're new to coding, check out <a href="https://www.freecodecamp.org/">freeCodeCamp's open source curriculum</a>.
     </ol>
     <p>Happy coding!
   </div></div>