add html page to go with new route

app/templates/allposts.html

@@ -0,0 +1,20 @@
+<!-- extend base layout -->
+{% extends "base.html" %}
+
+{% block content %}
+    {% for post in posts %}
+        {% include 'post.html' %}
+    {% endfor %}
+    <ul class="pager">
+        {% if posts.has_prev %}
+        <li class="previous"><a href="{{ url_for('index', page=posts.prev_num) }}">Newer posts</a></li>
+        {% else %}
+        <li class="previous disabled"><a href="#">Newer posts</a></li>
+        {% endif %}
+        {% if posts.has_next %}
+        <li class="next"><a href="{{ url_for('index', page=posts.next_num) }}">Older posts</a></li>
+        {% else %}
+        <li class="next disabled"><a href="#">Older posts</a></li>
+        {% endif %}
+    </ul>
+{% endblock %}