To make DDNS with Cloudflare API v4.0
This is based on the scripts contributed by fuyuanli's gist https://gist.github.com/fuyuanli/b2a586ffd5aefcbf453437e9ce663b48
- You have to get your Zone ID, your API token (or Global Key), and the Record ID.
- This is used on macOS. Windows users should make some adjustments to make it compatibale with Windows.