Hướng dẫnfix fetch from localhost to outside server error, fetch error, fetch timeout, fetch with cloudflare, fetch have ipv6 in nodejs

Here is 2 line power to fix fetch. Node >17 default is using ipv6 if your network have. And server outside can't response to ipv6.

const dns = require('node:dns');
dns.setDefaultResultOrder('ipv4first');