Don't force redirect if unsecure_server is defined

templates/nginx.conf.j2

@@ -24,10 +24,12 @@ server {
   {% endif %}
     server_name {{ domains | join(' ') }};
 
+{%+ if notls is not defined and unsecure_server is not defined %}
     location / {
         # enforce https
         return 301 https://$server_name:443$request_uri;
     }
+{% endif %}
     {% if unsecure_server is defined -%}
     {{ unsecure_server | indent(4) }}
     {%- endif %}