Setup next on github pages

.github/workflows/setup-node/action.yml

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+# File: .github/workflows/setup-node/action.yml
+name: setup-node
+description: "Setup Node.js - Cache dependencies - Install dependencies"
+runs:
+  using: "composite"
+  steps:
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: 20
+
+    - name: Cache dependencies
+      id: cache_dependencies
+      uses: actions/cache@v3
+      with:
+        path: node_modules
+        key: node-modules-${{ hashFiles('package-lock.json') }}
+
+    - name: Install dependencies 
+      shell: bash
+      if: steps.cache_dependencies.outputs.cache-hit != 'true'
+      run: npm ci

.github/workflows/setup-node/publish.yml

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+# File: .github/workflows/publish.yml
+name: publish-to-github-pages
+on:
+  push:
+    branches:
+      - master
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js - Cache dependencies - Install dependencies
+        uses: ./.github/workflows/setup-node
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+        with:
+          static_site_generator: next
+
+      - name: Build with Next.js
+        run: npx next build
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./out
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    runs-on: ubuntu-latest
+    needs: build
+
+    steps:
+      - name: Publish to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

next.config.js

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+/** @type {import('next').NextConfig} */
+const nextConfig = {
+    output: "export",  // <=== enables static exports
+    reactStrictMode: true,
+  };
+
+  module.exports = nextConfig;