add fail_reason to db and make adjustment to html table

xmrnodes/models.py

@@ -17,6 +17,7 @@ class Node(Model):
     datetime_entered = DateTimeField(default=datetime.now)
     datetime_checked = DateTimeField(default=None, null=True)
     datetime_failed = DateTimeField(default=None, null=True)
+    fail_reason = CharField(null=True)
 
     class Meta:
         database = db

xmrnodes/templates/index.html

@@ -8,6 +8,7 @@
     <h3>Add Node</h3>
   </div>
 
+  {% if nodes %}
   <table>
     <tr>
     <th>URL</th>
@@ -28,6 +29,7 @@
     </tr>
     {% endfor %}
   </table>
+  {% endif %}
 
 
   <form method="POST" action="{{ url_for('add') }}">