Fix log files + README

config/nginx.conf

@@ -30,7 +30,7 @@ http {
             #client_max_body_size 30M;
         }
 
-	access_log /var/log/access.log;
-	error_log /var/log/error.log error;
+	access_log /var/log/nginx/access.log;
+	error_log /var/log/nginx/error.log error;
     }
 }