Use tier0 mirror on build servers

There is a need for build servers to never build against outdated repo databases, even with syncrepo providing a local mirror that is updated every minute.

roles/dbscripts/templates/nginx.d.conf.j2

@@ -54,7 +54,7 @@ server {
 }
 
 server {
-    listen       {{ wireguard_address }}:80;
+    listen       {{ wireguard_address }};
     server_name  {{ wireguard_address }};
     root         /srv/ftp;
     access_log   /var/log/nginx/internal_mirror/access.log main;