add a note on what to do if Nexcloud does not open

Signed-off-by: Simon L <szaimen@e.mail.de>

php/templates/containers.twig

@@ -207,6 +207,9 @@
                             <b>{{ nextcloud_password }}</b><br><br>
                         {% endif %}
                         <a href="https://{{ domain }}" class="button" target="_blank" rel="noopener">Open your Nextcloud ↗</a><br/>
+                        {% if borg_backup_host_location != '' %}
+                            If your Nextcloud does not open when clicking the button above, see <b><a href="https://github.com/nextcloud/all-in-one/discussions/2105">this documentation<a/></b><br><br>
+                        {% endif %}
                     {% else %}
                         {% if isAnyRestarting == false %}
                             <span class="status running"></span> Containers are currently starting.<br /><br />