adjust jinja2 templates to handle cases of no description

app/templates/task.html

@@ -8,7 +8,9 @@
             <div>
                 <div>
                     <br>
-                    <p>{{ task.description }}</p>
+                    {% if task.description != None %}
+                        <p>{{ task.description }}</p>
+                    {% endif %}
                 </div>
                 <div>
                     <p>Created: {{ createdTime.strftime('%Y-%m-%d %I:%M %p') }} </p>