chore(deprecation): add deprecation banner

dpaste/templates/dpaste/base.html

@@ -27,14 +27,10 @@ <h1>{% block headline %}<a class="home" href="{% url "snippet_new" %}">{{ dpaste
 {% block options %}{% endblock %}
 
 <main>
-  <div style="text-align:center;color:#fff;background-color:rgb(23, 37, 94);padding-top: 10px;padding-bottom: 10px;padding-left: 10px;padding-right: 10px;">
-    paste.mozilla.org allows you to share code snippets and notes with others.
-    These pastes require a link to be viewed; they are not private.
-    Anyone with the link is able to see the paste and also delete it.
+  <div style="text-align:center;color:#fff;background-color:rgb(255, 0, 0);padding-top: 10px;padding-bottom: 10px;padding-left: 10px;padding-right: 10px;">
     <p>
       <b>
-      <br>
-        Please refrain from sharing personal or sensitive information on this website to avoid it being viewed by other parties.
+        Effective March 31, 2025, this app will no longer be supported and will be removed from availability.
       </b>
     </p>
   </div>