feat(sqldb): support ENCORE_DOCKER_NETWORK env var

[odsod]

Summary

• Pass --network to docker run when ENCORE_DOCKER_NETWORK is set
• Fixes Support configurable Docker network for test databases (ENCORE_DOCKER_NETWORK) #2382: Postgres containers are unreachable in Google Cloud Build, where build steps run on the cloudbuild Docker network

Usage

# Google Cloud Build
- id: test
  name: my-builder-image
  env:
    - ENCORE_DOCKER_NETWORK=cloudbuild
  args: [-c, encore test ./...]

[fredr]

Thanks for adding this!

I don't think it is enough to just set the network name, we connect to 127.0.0.1 down in clusterStatus, and for this to work I think we need to use the container name instead. So maybe if the docker network env var is set, connect to containerName:port instead of 127.0.0.1:port