Styled the post list and added updating of posts

views/posts/index.html

@@ -1 +1,17 @@
-<h1>Posts go here</h1>
+<main class="container">
+  <div class="my-4">
+    <a href="/sites/{{ .site.ID }}/posts/new" class="btn btn-success">New Post</a>
+  </div>
+
+  {{ range $i, $p := .posts }}
+    {{ if gt $i 0 }}<hr>{{ end }}
+    <div class="my-4">
+      {{ if $p.Title }}<h4 class="mb-3">{{ $p.Title }}</h4>{{ end }}
+      {{ $p.Body | markdown }}
+      <div class="mb-3">
+        <a href="/sites/{{ $.site.ID }}/posts/{{ $p.ID }}/edit"
+           class="link-secondary link-offset-2 link-underline link-underline-opacity-0 link-underline-opacity-75-hover">Edit</a>
+      </div>
+    </div>
+  {{ end }}
+</main>