Kieran's opinionated (and probably slightly dumb) nix config

docs: update instructions with proper disko

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README.md
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1. Install NixOS via the [official guide](https://nixos.org/download.html)
2. `sudo -i`
3. Enable git with `sed -i 's/^{$/{\n programs.git.enable = true;/' /etc/nixos/configuration.nix` and then run `nixos-rebuild switch`
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4. Download the disk config with `curl -o disk-config.nix https://github.com/kcoderhtml/dots/raw/master/moonlark/disk-config.nix`
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5. Run disko with `nix --experimental-features "nix-command flakes" run github:nix-community/disko -- --mode disko disk-config.nix`
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4. Download the disk config with `curl https://github.com/kcoderhtml/dots/raw/master/moonlark/disk-config.nix -o /tmp/disk-config.nix`
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5. Run disko with `nix --experimental-features "nix-command flakes" run github:nix-community/disko -- --mode disko /tmp/disk-config.nix`
6. Clone this repo to your `/root/dots` folder with `git clone https://github.com/kcoderhtml/dots.git`
7. `nixos-install --flake .#moonlark`