What security considerations should I keep in mind when using a startup script to update Cloudflare DNS on my UDM?

Security is crucial. Avoid hardcoding your Cloudflare API token directly into the script. Instead, store it as an environment variable accessible only to the script. Regularly review the script for vulnerabilities. Limit the API token's permissions to only what's necessary (DNS edit). Consider using a more secure method for storing credentials if available in future UDM updates.