I'd advise using Linux instead. I don't think I've seen any selfhosters/homelabs use Windows Server. I know you've said you wanted to use Docker but Proxmox is a good hypervisor that is used to run Linux containers and can be setup to run Docker containers as well.

Why do you plan to run a DNS server at home? It seems to me like your plan is to access your server from outside. For that you can use your IP address or alternatively you can lease a domain and set its DNS to your IP and use that instead. You can also use a free service like DuckDNS instead.