Add production use information for Public Device URL #3214
Description
The Public Device Url is not meant to be used in a mission critical environment and is there for debugging reasons only. We should make it clear in the documentation here in this section of the docs https://docs.balena.io/learn/manage/actions/#public-device-url
The content we can add in a new paragraph could be something like,
The Public URL is more of a tool for remote configuration and debugging. The service is not meant for production use, and it's not recommended to be used on the critical path of your application. The Public Device URL service is built on top of the Cloudlink service. The Cloudlink service can be down momentarily due to re-configuration or scaling, but it reconnects with the device automatically. There are other complementary services (e.g. Tailscale) that are more suited for that purpose and could be used in production. You can even use Cloudflare Tunnels to expose service from a port on your device.