🛑 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, 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