cache setup && optimalize for google pagespeed && optimalize all images

src/Mine/SeekerBundle/Resources/views/Game/index.html.twig

@@ -1,5 +1,15 @@
 {% extends "@MineSeeker/layout.html.twig" %}
 
+{% block title %} - The Game{% endblock %}
+
+{% block metas %}
+    <meta property="og:url" content="{{ url('MineSeekerBundle_homepage') }}"/>
+    <meta property="og:type" content="website"/>
+    <meta property="og:title" content="MineSeeker"/>
+    <meta property="og:description" content="A multiplayer minesweeper game"/>
+    <meta property="og:image" content="{{ app.request.getSchemeAndHttpHost() }}{{ asset('bundles/mineseeker/images/mine-1600x627.png') }}"/>
+{% endblock %}
+
 {% block header %}
     <section class="header-content">
         <div class="logo">