Fix LE certs for IPv6 only domains Fixes 394

backend/templates/letsencrypt-request.conf

@@ -2,6 +2,10 @@
 
 server {
   listen 80;
+{% if ipv6 -%}
+  listen [::]:80;
+{% endif %}
+
   server_name {{ domain_names | join: " " }};
 
   access_log /data/logs/letsencrypt-requests.log standard;