fix error log bug

nginx.conf

@@ -19,7 +19,7 @@ http {
         listen 8080;
         server_name localhost;
 	access_log logs/access.log main_with_time;
-        error_log logs/error.log main_with_time warn;
+        error_log logs/error.log warn;
 
         # 静态资源根目录
         set $root_path "/var/www/html";