add policy-ui build

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "test";
+  description = "policy-ui - Policy management dashboard";
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs";
@@ -10,15 +10,88 @@
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
+        lib = pkgs.lib;
 
-      in {
-        devShell =
-        pkgs.mkShell {
-          buildInputs = with pkgs;
-             [
-               nodejs
-               vue-language-server
-            ];
+        pname = "policy-ui";
+        version = "1.0.0";
+
+        pnpmDeps = pkgs.fetchPnpmDeps {
+          inherit pname version;
+          src = lib.cleanSource ./.;
+          pnpm = pkgs.pnpm;
+          fetcherVersion = 3;
+          hash = "sha256-v1vdqb3ruLB9vvPzxjT+11W4jG/MvoCPVXZPHHE9eGs=";
         };
-      });
+
+        policy-ui = pkgs.stdenv.mkDerivation {
+          inherit pname version;
+
+          src = lib.cleanSource ./.;
+
+          nativeBuildInputs = [
+            pkgs.pnpmConfigHook
+            pkgs.pnpm
+            pkgs.nodejs
+          ];
+
+          inherit pnpmDeps;
+
+          buildPhase = ''
+            runHook preBuild
+
+            export NUXT_TELEMETRY_DISABLED=1
+
+            pnpm build
+
+            runHook postBuild
+          '';
+
+          installPhase = ''
+            runHook preInstall
+
+            mkdir -p $out
+            cp -r ./.output $out/
+
+            runHook postInstall
+          '';
+        };
+
+        dockerImage = pkgs.dockerTools.buildLayeredImage {
+          name = "policy-ui";
+          contents = [
+            policy-ui
+            pkgs.busybox
+            pkgs.shadow
+          ];
+          config = {
+            Cmd = [
+              "${pkgs.nodejs}/bin/node"
+              "${policy-ui}/.output/server/index.mjs"
+            ];
+            Env = [
+              "HOST=0.0.0.0"
+              "PORT=3000"
+              "NODE_ENV=production"
+            ];
+          };
+        };
+
+      in
+      {
+        packages = {
+          default = policy-ui;
+          inherit policy-ui;
+          dockerImage = dockerImage;
+        };
+
+        devShell =
+          pkgs.mkShell {
+            buildInputs = with pkgs; [
+              nodejs
+              vue-language-server
+              pnpm
+            ];
+          };
+      }
+    );
 }