feat: add flake package output

.gitignore

@@ -5,3 +5,4 @@ out.css
 *.db
 tmp
 .direnv
+result

flake.nix

@@ -2,7 +2,11 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
   };
-  outputs = {nixpkgs, ...}: let
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }: let
     systems = [
       "x86_64-linux"
       "aarch64-linux"
@@ -13,9 +17,48 @@
       nixpkgs.lib.genAttrs systems (system: let
         pkgs = import nixpkgs {inherit system;};
       in
-        f system pkgs);
+        f {
+          inherit pkgs;
+          inherit (pkgs) lib;
+        });
   in {
-    devShells = forAllSystems (system: pkgs: {
+    packages = forAllSystems ({
+      lib,
+      pkgs,
+      ...
+    }: {
+      guzone = pkgs.buildGoModule {
+        name = "guz.one";
+        pname = "guz.one";
+
+        env = {
+          GOWORK = "off";
+        };
+
+        version = "v0.1.0";
+
+        src = lib.cleanSource ./.;
+
+        nativeBuildInputs = [
+          pkgs.tailwindcss_4
+        ];
+
+        vendorHash = "sha256-qw60GsRSZcevR4tvxsoQi3RWbZU291s6ZB8YJnaoh0Q=";
+
+        preBuild = ''
+          tailwindcss \
+            -i ./assets/tailwind.css \
+            -o ./assets/out.css
+          ls -a ./assets
+        '';
+
+        meta = {
+          mainProgram = "guz.one";
+        };
+      };
+      default = self.packages.${pkgs.stdenv.hostPlatform.system}.guzone;
+    });
+    devShells = forAllSystems ({pkgs, ...}: {
       default = pkgs.mkShell {
         CGO_ENABLED = "1";
         hardeningDisable = ["fortify"];