Refactor the whole codebase. Most notable changes:

- No more fail2ban. It didn't work properly
  anyways, I'll need to look into this in the future
- No nix-super. I don't need it and the overlay is
  broken so I'm waiting for that to be fixed first.
- Uses nh instead of nixos-rebuild. This is much
  better.

hosts/disk/default.nix

@@ -0,0 +1,41 @@
+{ config, lib, keys, ... }: with lib; merge
+
+(systemConfiguration {
+  system.stateVersion  = "23.11";
+  nixpkgs.hostPlatform = "x86_64-linux";
+
+  networking.domain = "rgbcu.be";
+
+  secrets.floppyPassword.file  = ./password.floppy.age;
+
+  users.users = {
+    root.hashedPasswordFile = config.secrets.floppyPassword.path;
+
+    floppy = sudoUser {
+      description                 = "Floppy";
+      openssh.authorizedKeys.keys = [ keys.enka ];
+      hashedPasswordFile          = config.secrets.floppyPassword.path;
+    };
+  };
+
+  networking = {
+    defaultGateway  = "23.164.232.1";
+    defaultGateway6 = "2602:f9f7::1";
+
+    interfaces.ens32 = {
+      ipv4.addresses = [{
+        address      = "23.164.232.40";
+        prefixLength = 25;
+      }];
+
+      ipv6.addresses = [{
+        address      = "2602:f9f7::40";
+        prefixLength = 64;
+      }];
+    };
+  };
+})
+
+(homeConfiguration {
+  home.stateVersion = "23.11";
+})