Add info about cookies

Technically not required. As long as all cookies are needed for site functionality and no personal data processing or ads exist this notice is not needed.

WebHost/templates/layout.html

@@ -18,4 +18,10 @@
     {% endif %}
 {% endwith %}
 {% block body %}{% endblock %}
+<footer class="page-footer" style="position: fixed; left: 0; bottom: 0; width: 100%; text-align: center">
+    <div class="container">
+        <span class="text-muted">This site uses a cookie to track your session in order to give you ownership over uploaded files and created instances.</span>
+        {#  <button type="button" class="btn btn-secondary btn-sm" onclick="document.getElementById('cookiefooter').remove()">X</button> #}
+    </div>
+</footer>
 </body>