nginx 錯誤頁面

error_page 400 404 405 =200 @40*_json;
    location @40*_json {
        default_type application/json;
        return 200 '{"errcode":"404", "errmsg": "Hi guy,the API you are visiting does not exist, please check the URL and parameters."}';
    }
        error_page 500 502 503 504 =200 @50*_json;
        location @50*_json {
                default_type application/json;
                return 200 '{"errcode":"1", "errmsg": "Server internal error, please contact the developer"}';
        }

error_page   500 502 503 504  /50x.html;
       location = /50x.html {
               root   html/;
       }