feat: add new host and start modularizing system configuration

hosts/titanium/disko.nix

@@ -0,0 +1,76 @@
+{ ... }:
+{
+  # Based on:
+  # https://github.com/nix-community/disko/blob/master/example/luks-btrfs-subvolumes.nix
+  #
+  # Run with:
+  # `sudo nix --experimental-features "nix-command flakes" run github:nix-community/disko/latest -- --mode destroy,format,mount /tmp/disk-config.nix`
+  disko.devices = {
+    disk = {
+      main-disk = {
+	      type = "disk";
+	      device = "/dev/disk/by-path/pci-0000:08:00.0-ata-2";
+	      content = {
+		type = "gpt";
+		partitions = {
+		  ESP = {
+		    size = "512M";
+		    type = "EF00";
+		    content = {
+		      type = "filesystem";
+		      format = "vfat";
+		      mountpoint = "/boot";
+		      mountOptions = [ "umask=0077" ];
+		    };
+		  };
+		  luks = {
+		    size = "100%";  # Full Disk Encryption
+		    content = {
+		      type = "luks";
+		      name = "crypted";
+		      # disable settings.keyFile if you want to use interactive password entry
+		      # passwordFile = "/tmp/secret.key";  # Interactive
+		      settings = {
+			allowDiscards = true;
+			#keyFile = "/tmp/secret.key";
+		      };
+		      #additionalKeyFiles = [ "/tmp/additionalSecret.key" ];
+		      content = {
+			type = "btrfs";
+			extraArgs = [ "-f" ];  # What?
+			subvolumes = {
+			  "/root" = {
+			    mountpoint = "/";
+			    mountOptions = [
+			      "compress=zstd"
+			      "noatime"
+			    ];
+			  };
+			  "/home" = {
+			    mountpoint = "/home";
+			    mountOptions = [
+			      "compress=zstd"
+			      "noatime"
+			    ];
+			  };
+			  "/nix" = {
+			    mountpoint = "/nix";
+			    mountOptions = [
+			      "compress=zstd"
+			      "noatime"
+			    ];
+			  };
+			  "/swap" = {
+			    mountpoint = "/.swapvol";
+			    swap.swapfile.size = "16G";
+			  };
+			};
+		      };
+		    };
+		  };
+		};
+	      };
+	};
+    };
+  };
+}