Merge pull request #584 from NebulousLabs/new-nginx-metrics-for-performance

add new nginx metrics to measure performance

docker/nginx/nginx.conf

@@ -40,7 +40,9 @@ http {
         '"$http_user_agent" $upstream_response_time '
         '$upstream_bytes_sent $upstream_bytes_received '
         '"$upstream_http_content_type" "$upstream_cache_status" '
-        '"$portal_domain" "$upstream_http_skynet_skylink"';
+        '"$portal_domain" "$upstream_http_skynet_skylink" '
+        '$upstream_connect_time $upstream_header_time '
+        '$request_time "$hns_domain"';
 
     access_log  logs/access.log  main;