Idea: Docs for implementing NixOS-WSL in a Flake

[gpfaucher]

Hi there! I'm still quite new to Nix and NixOS, but I'm getting started. I've had to start learning about NixOS-WSL due to a new job that will require me to switch from Linux to Windows. I've got everything up and running, but I had one major gripe: the documentation suggests creating a WSL (instance) using a tarball, an for the rest of the documentation imports it as a module. This requires configurations to be build with the --impure flag and is a lot less neat that implementing it as a flake IMO.

I'd be more than willing to make a PR for this, as it's quite straightforward: I think adding an example flake.nix with nixos-wsl.url = "github:nix-community/NixOS-WSL"; as input, and an example nixosSystem importing nixos-wsl.nixosModules.wsl would solve this.

If I missed something and / or made an error please let me know! I'm still very inexperienced with open source and I'm still a junior / medior developer as well. Cheers!

[SuperSandro2000]

sure, why not, we could add an example flake