Build failed because DOCKER_HOST_IP is used but not set on circle ci

[dartartem]

See: https://app.circleci.com/pipelines/github/eventuate-examples/eventuate-quarkus-examples-customers-and-orders/2/workflows/b89aea93-7596-4623-9f50-84449414be8a/jobs/2

Order-service uses docker-compose file with customer service for tests.
It relies on DOCKER_HOST_IP: https://github.com/dartartem/eventuate-quarkus-examples-customers-and-orders/blob/81a6f6896dee2cc3587f187a376e734b0ab30e04/orders-service/docker-compose-integration-tests-eventuate-local-mssql-polling.yml#L15