const cluster = new bottle.BottlerocketCluster(this, 'Cluster');

    const ami = ssm.StringParameter.valueForStringParameter(this, '/aws/service/bottlerocket/aws-k8s-1.15/x86_64/latest/image_id');

    cluster.node.findAll().forEach(s => {
      if (s instanceof asg.CfnLaunchConfiguration) {
        const asg = s as asg.CfnLaunchConfiguration;
        asg.imageId = ami;
      }
    });