leave a note for web compatible nodes (#15)

xmrnodes/templates/index.html

@@ -42,6 +42,14 @@
     {% if nodes %}
     <div class="xmrnodes">
       <p class="center">
+        {% if web_compatible %}
+        <strong>
+          Web compatible means the node is run on such a way that it allows web clients to access their APIs (CORS headers allow all and secure HTTP / TLS terminated).
+          <br>
+          The more nodes there are running with these settings the more robust web clients will be in the future.
+        </strong>
+        <br><br>
+        {% endif %}
         Tracking {{ nodes_all }} {{ nettype }} {{ crypto | capitalize }} nodes in the database.
         <br>
         Of those, {{ nodes_unhealthy }} nodes failed their last check-in (unresponsive to ping or over 100 blocks away from highest reported block).