unable to get db-instance ! {
    "msg": "SQLSTATE[HY000] [2002] Connection refused",
    "file": "\/volume\/sales\/_source\/vendor\/catfan\/medoo\/src\/Medoo.php",
    "line": 478,
    "conf": {
        "host": "mysql",
        "port": 3306,
        "db": "sales",
        "user": "root",
        "driver": "mysql",
        "charset": "utf8",
        "collation": "utf8_general_ci",
        "engine": "MyISAM",
        "pw": "***********",
        "option": [],
        "command": []
    },
    "trace": [
        {
            "file": "\/volume\/sales\/_source\/shop\/src\/Application\/Utilities\/UserHelper.php",
            "line": 1539,
            "function": "getInstance",
            "class": "Framework\\Db",
            "type": "::"
        },
        {
            "file": "\/volume\/sales\/_source\/src\/Framework\/ConfigLoader.php",
            "line": 685,
            "function": "loadUser",
            "class": "Application\\Utilities\\UserHelper",
            "type": "::"
        },
        {
            "file": "\/volume\/sales\/_source\/src\/Framework\/ConfigLoader.php",
            "line": 596,
            "function": "initUser",
            "class": "Framework\\ConfigLoader",
            "type": "::"
        },
        {
            "file": "\/volume\/sales\/_source\/src\/Framework\/ConfigLoader.php",
            "line": 107,
            "function": "readCustomerConfig",
            "class": "Framework\\ConfigLoader",
            "type": "::"
        },
        {
            "file": "\/volume\/sales\/_source\/global\/system_config_loader.php",
            "line": 13,
            "function": "loadConfig",
            "class": "Framework\\ConfigLoader",
            "type": "::"
        },
        {
            "file": "\/volume\/sales\/_source\/global\/preloader.php",
            "line": 15,
            "args": [
                "\/volume\/sales\/_source\/global\/system_config_loader.php"
            ],
            "function": "require_once"
        },
        {
            "file": "\/volume\/sales\/_source\/index.php",
            "line": 11,
            "args": [
                "\/volume\/sales\/_source\/global\/preloader.php"
            ],
            "function": "require_once"
        },
        {
            "file": "\/volume\/sales\/index.php",
            "line": 13,
            "args": [
                "\/volume\/sales\/_source\/index.php"
            ],
            "function": "require"
        }
    ]
}