css and posts

templates/post-preview.html

@@ -1,4 +1,7 @@
-<div>
-    <h2>{{ post.title }}</h2>
-    {{ post.summary }}
-</div>
+<a href="/posts/{{ post.slug }}">
+    <div class="postpreview">
+        <h2>{{ post.title }}</h2>
+        <img src="{{ post.preview_image }}">
+        {{ post.summary }}
+    </div>
+</a>