Is it possible to change the port exposed when using services (specifically postgres)?

[Cindy Lopes]

We want to run our e2e tests on bitbucket pipelines. This requires us to run a PostgreSQL database as a service.

By default PostgreSQL runs on 5432 but our tests expect it to run on a different port.

Given that the service is run as a docker container is it possible to change the exposed port of the docker container to something else?

(Note: We likely can workaround this issue but it would be nice to know if this feature is available)

Thanks!