🛑 Caution
┗━━ manual (Manual proxy configuration)
    ┗━━ http_proxy (HTTP Proxy)
        ┗━━ address (HTTP address)
            ┣━━ 🔔 the value "not a valid domain name.com" is an invalid domain 
            ┃   name, could be a IP, otherwise must start with lowercase 
            ┃   characters followed by lowercase characters, number, "-" and "."
            ┃   characters are allowed, it will be ignored when loading from the
            ┃   YAML file "config/03/config.yml"
            ┗━━ 🛑 mandatory variable but has no value