How can I use Cloudflare Dynamic DNS to update my WireGuard server's public IP address?

You'll need a script (e.g., Bash, Python) that retrieves your current public IP address (using a service like `icanhazip.com`) and then updates a DNS record in Cloudflare using the Cloudflare API. This script should run periodically (e.g., via cron) on a server or router with a static IP. The script needs your Cloudflare API credentials (email, API key) and the zone ID and record ID of the DNS record you want to update. Consider using a tool like `ddclient` or `cloudflare-update` which automate this process.