createContainer method
DockerContainer creation implementation.
Implementation
@override
Future<C> createContainer(DockerCommander dockerCommander) async {
  var dbPort = await this.dbPort;
  _log.info(
    'Initializing $dbType container at port: $dbPort (cleanContainer: $cleanContainer)',
  );
  var containerConfig = createDBContainerConfig(dbPort);
  var container = await containerConfig.run(
    dockerCommander,
    name: '${containerNamePrefix}_$dbPort',
    cleanContainer: cleanContainer,
  );
  _log.info('Container initialized: $container');
  return container;
}