added placeholder text to the homepage

core/templates/core/homepage.html

@@ -1,5 +1,6 @@
 {% extends 'base.html' %}
 
 {% block content %}
-    
+  <h1>URL Shortening Service</h1> 
+  <p>You have reached The Dazed Gerbil's URL shortening service. There is no one available to answer your call at present. Please call back later.</p>
 {% endblock %}