[{
    "step_title": "Install Settings",
    "items": [{
        "type": "textfield",
        "desc": "Listening Ports",
        "subitems": [{
            "key": "hbbs_port",
            "desc": "RustDesk ID Server Port",
            "defaultValue": "21116",
            "validator": {
                "allowBlank": false,
                "regex": {
                    "expr": "/^([0-9]{1,4}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])$/",
                    "errorText": "Digit number only"
                }
            }
        }, {
            "key": "hbbr_port",
            "desc": "RustDesk Relay Server Port",
            "defaultValue": "21117",
            "validator": {
                "allowBlank": false,
                "regex": {
                    "expr": "/^([0-9]{1,4}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])$/",
                    "errorText": "Digit number only"
                }
            }
        }]
    },{
        "type": "textfield",
        "desc": "Only allow the client with the same key",
        "subitems": [{
            "key": "key",
            "desc": "Key",
            "defaultValue": "21117",
            "validator": {
                "allowBlank": True,
            }
        }]
    }]
    }]