Hi
@ms16 when registering a flow with a backend API such as Prefect Server or Prefect Cloud you can optionally choose to store your flow in a Docker image that is then pushed to a registry. This means that you can have a single registry with multiple images, each containing a flow (or multiple flows)!
For more reading on this we have a section of the docs that should get you up and running with Docker storage
https://docs.prefect.io/orchestration/tutorial/docker.html