Fix header and about Docker links

docs/sources/index.md

@@ -6,7 +6,7 @@ page_keywords: docker, introduction, documentation, about, technology, understan
 
 **Develop, Ship and Run Any Application, Anywhere**
 
-[**Docker**](https://www.docker.io) is a platform for developers and sysadmins
+[**Docker**](https://www.docker.com) is a platform for developers and sysadmins
 to develop, ship, and run applications.  Docker lets you quickly assemble
 applications from components and eliminates the friction that can come when
 shipping code. Docker lets you get your code tested and deployed into production

docs/theme/mkdocs/header.html

@@ -25,8 +25,8 @@
     <ul class="nav">
       <li><a href="https://registry.hub.docker.com" title="Browse Repos">Browse Repos</a></li>
       <li><a href="http://docs.docker.com" title="Documentation">Documentation</a></li>
-      <li><a href="http://docker.com/community" title="Community">Community</a></li>
-      <li><a href="http://docker.com/resources/help/" title="Help">Help</a></li>
+      <li><a href="http://www.docker.com/community/participate/" title="Community">Community</a></li>
+      <li><a href="http://www.docker.com/resources/help/" title="Help">Help</a></li>
     </ul>
     <div id="usernav" class="pull-right">
       <ul class="nav user">