add link to documentation for index

_layouts/docs.html

@@ -11,6 +11,12 @@
     </div>
     <div id="main">
       {{ content }}
+
+    {% if page.edit_url %}
+      <h2>Can you help us improve these docs?</h2>
+      <p>The source of these docs is <a href="{{ page.edit_url }}">here</a> on GitHub. If you see a way these docs can be improved, please fork us!</p>
+    {% endif %}
+
     </div>
   </div>
 

docs/index.html

@@ -1,6 +1,7 @@
 ---
 layout: docs
 title: First Steps
+edit_url: "https://github.com/nylas/N1/blob/master/docs/index.md"
 ---
 <style>
 h3 {
@@ -302,4 +303,3 @@ GithubUserStore = Reflux.createStore
 <blockquote>
 <p>You can find a more extensive version of this example in our <a href="https://github.com/nylas/edgehill-plugins/tree/master/sidebar-github-profile">sample packages repository</a>.</p>
 </blockquote>
-