040000 tree 90ba991038190e349ce2467017b08238d9d3412d	basics
040000 tree 842f1f1a0374a429c513586e1c5c64a96fcb4124	deployment
040000 tree 8b60c7970fc8c0eed259b55fdbedfe7012680c49	operation
040000 tree 37cac3ea2d4a3f442b28864ed9a7900e6ff68488	security
040000 tree ea37095fcd5b870474da7448930b9e0fd9212113	storage