code: function rewriteDockerCompose(compose) {
    const services = compose.services;
    if (!services) {
      return compose;
    }
    const host = services._host;
    delete services._host;
    Object.keys(services).forEach((k) => {
      if (!isHelperContainer(k)) {
        mergeWith(services[k], host);
      }
    });
    return compose;
  }
docs: rewrite the compose by inlining _host to all services not containing a dash, such that both api and celery have the same entry
  @param compose