feat: allow custom base url

src/beaver_gateway/frontends/admin/templates/audit.html

@@ -25,7 +25,7 @@
     </table>
     <p class="muted" style="margin-top:1rem;">
       {% if next_before %}
-        <a href="/audit?before={{ next_before }}">Older entries →</a>
+        <a href="{{ p }}/audit?before={{ next_before }}">Older entries →</a>
       {% else %}
         End of log.
       {% endif %}