Update nginx.conf

Author: ChandonPierre

nginx.conf

@@ -81,7 +81,12 @@ http {
         '"upstream_response_time":"$upstream_response_time",'
         '"host":"$host",'
         '"proxy_host":"$proxy_host",'
-        '"upstream":"$upstream_addr"'
+        '"upstream":"$upstream_addr",'
+        '"user_agent":"$http_user_agent",'
+        '"remote_addr":"$remote_addr",'
+        '"key":"$cache_key",'
+        '"upstream_bytes_received":"$upstream_response_length",'
+        '"upstream_response_time":"$upstream_response_time"'
       '}';
 
     gzip  off;