how do I set the graphql endpoint via environment variable? right now I see:

Couldn't connect to Prefect Server at <https://localhost:4201/graphql>

but I would like to change that

The env var should be

PREFECT_API_URL

according to this: https://github.com/PrefectHQ/prefect/blob/master/src/prefect/cli/docker-compose.yml

ty