When running the tutorial in https://github.com/dagster-io/dagster/tree/0.15.6/examples/deploy_ecs i am getting the following error:

A load balancer cannot be attached to multiple subnets in the same Availability Zone (Service: AmazonElasticLoadBalancing; Status Code: 400; Error Code: InvalidConfigurationRequest; Request ID: 4acb2730-3aba-4b50-b33b-a0dd9b8ec905; Proxy: null)

Hi Lucas - I see some reports of this in an issue with the compose-CLI here, there are a couple of suggested workarounds there that might help: https://github.com/docker/compose-cli/issues/921