update templates with task expiry

app/templates/task.html

@@ -29,6 +29,9 @@
                 <div>
                     <p>Due: {{ task.due_timestamp }}</p>
                 </div>
+                <div>
+                    <p>Expires: {{ task.expiryDate }}</p>
+                </div>
                 <p>
                     <a class="btn btn-primary" href="/task/{{task.id}}/edit">Edit Task</a>
                     <span>