Feature request: "health check" to test availability

Idea by @daviddias on scuttlebutt:

>Are you planning on integrating a "health check" in which users can check the number of replicas available and confirm if it is still pinned?

It would be nice to have a way to monitor latency and uptime for pinning services, don't know how that would fit within ipfs-deploy yet or if a different service.

I do want to add more "deployment management" things like CID history, easy rollbacks, etc.