nodejs: add simple nextjs example

examples/packages/single-language/nodejs-nextjs/README.md

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+# Nextjs Example
+
+Here we package nextjs statically with `output: "export"`.
+
+Which can be served statically with any web-server e.g.
+
+`npx http-server result/out/`

examples/packages/single-language/nodejs-nextjs/default.nix

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+{
+  lib,
+  config,
+  dream2nix,
+  ...
+}: {
+  imports = [
+    dream2nix.modules.dream2nix.WIP-nodejs-builder-v3
+  ];
+
+  mkDerivation = {
+    src = ./nextjs-app;
+  };
+
+  deps = {nixpkgs, ...}: {
+    inherit
+      (nixpkgs)
+      fetchFromGitHub
+      stdenv
+      ;
+  };
+
+  WIP-nodejs-builder-v3 = {
+    packageLockFile = "${config.mkDerivation.src}/package-lock.json";
+  };
+
+  name = "nextjs-app";
+  version = "0.1.0";
+}

examples/packages/single-language/nodejs-nextjs/flake.nix

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+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/nodejs-nextjs/nextjs-app/.eslintrc.json

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+{
+  "extends": "next/core-web-vitals"
+}

examples/packages/single-language/nodejs-nextjs/nextjs-app/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+.yarn/install-state.gz
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

examples/packages/single-language/nodejs-nextjs/nextjs-app/README.md

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+This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/basic-features/font-optimization) to automatically optimize and load Inter, a custom Google Font.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.

examples/packages/single-language/nodejs-nextjs/nextjs-app/next.config.mjs

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+/** @type {import('next').NextConfig} */
+const nextConfig = {
+  output: "export",
+};
+
+export default nextConfig;