🛑 Caution
┗━━ dns_over_https (DNS over HTTPS)
    ┗━━ custom_dns_url (Custom DNS URL)
        ┣━━ 🔔 the value "http://dns.net" is an invalid URL, must starts with 
        ┃   'https://' only, it will be ignored when loading from the YAML file 
        ┃   "config/03/config.yml"
        ┗━━ 🛑 mandatory variable but has no value