added tags functionality

templates/post.html

@@ -5,5 +5,10 @@
     <p class="date">{{ page.date }}</p>
     <div class="post-body">
         {{ page.html|safe }}  </div>
+      {% for t in page.tags %}
+    <a href="{{ url_for('tag', tag_name=t) }}">{{ t }}</a>{% if not loop.last %}, {% endif %}
+  {% endfor %}
 </article>
+
+
 {% endblock %}