Looks interesting, does Rove also provide support for issuing TLS certificates for container services? I am also working on something similar, but it will be running on Kubernetes clusters.
Rove is not a service, it does not have a runtime, is not a build tool, and not exclusive to running HTTP services. It deploys Docker images as provided without modification. Auto-issuing certificates would be the job of software built into your deployed images. For example, a Caddy process. At some point I should write how-to guides to illustrate common use-cases like running a HTTPS and deploying from CI though.