refactor(index.html): make logout a button

judas_server/web/templates/index.html

@@ -11,7 +11,7 @@
         <header>
             <h1><a href="{{ url_for('index') }}">judas</a></h1>
             {% if logged %}
-            <p>Welcome, {{ username }}! <a href="{{ url_for('logout') }}">Logout</a></p>
+            <p><a class="button" href="{{ url_for('logout') }}">Logout</a></p>
             {% else %}
             <p><a class="button" href="{{ url_for('login') }}">Login</a></p>
             {% endif %}