Add request time and upstream request time to the nginx logs

Fixes #1026

conf/http-base.conf

@@ -5,7 +5,8 @@ real_ip_recursive on;
 log_format lb_pp '$remote_addr ($proxy_protocol_addr) '
                   '- $remote_user [$time_local] '
                   '"$request" $status $body_bytes_sent '
-                  '"$http_referer" "$http_user_agent"';
+                  '"$http_referer" "$http_user_agent" '
+                  '($request_time $request_length $upstream_response_time)';
 
 types_hash_max_size 2048;
 include /usr/local/nginx/conf/mime.types.default;