docker compose to connect to database running on host machine?

[ScottChapman]

So, I realize this might be more of a "how do I do that in docker compose?" sort of thing, but figured I would post here.
I am running Hasura with docker compose on my host. I am also running a postgres DB on the same host running docker.
I want Hasura to be able to connect to the DB running on the host.
What I tried was adding

extra_hosts:
      - "host.docker.internal:host-gateway"

to the container def for both the data-connector-agent and the graphql-engine. But when I try to create a new data source it isn't able to connect to host.docker.internal

What am I missing? Is there a better way to do this?