Update cloudflare DNS.
This utility may be useful if you are using Cloudflare as a dydnamic DNS service. The utility will check the current external IP address and then update Cloudflare's DNS to direct traffic to your external IP.
The utility requires a config file:
{
    "Domains": ["yourdomain.com"],
    "ApiKey": "ApiKeyFromCloudFlare"
}
You can run the utility as a cron.
go build