qiankun.js 提示died in status LOADING_SOURCE_CODE: Failed to fetch

qiankun.js本地测试没问题，子应用打包放到nginx后，主应用再次加载子应用，就提示：

died in status LOADING_SOURCE_CODE: Failed to fetch

这是因为Nginx没有配置跨域请求，只要做如下配置，重启nginx，再次加载子应用就没问题了：

location / {  
    add_header Access-Control-Allow-Origin *;
    add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
    add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';
    if ($request_method = 'OPTIONS') {
        return 204;
    }
}

关于nginx跨域，详见：Nginx配置跨域请求 Access-Control-Allow-Origin *