added ipv6 support

Author: alaub81

data/nginx/conf.d/stats.example.com.conf

@@ -1,13 +1,15 @@
 # --- Redirect HTTP -> HTTPS ---
 server {
     listen 80;
+    listen [::]:80;
     server_name stats.example.com;
     return 301 https://$host$request_uri;
 }
 
 # --- HTTPS vHost: GoAccess Live Report ---
 server {
     listen 443 ssl;
+    listen [::]:443 ssl;
     http2 on;
     server_name stats.example.com;