Add GitHub Page workflow

.github/workflows/nuxtjs.yml

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+# Sample workflow for building and deploying a Nuxt site to GitHub Pages
+#
+# To get started with Nuxt see: https://nuxtjs.org/docs/get-started/installation
+#
+name: Deploy Nuxt site to Pages
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["exo-2_payment_calculator"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  # Build job
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: npm
+      - name: Restore cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            .npm
+            .nuxt
+          key: ${{ runner.os }}-nuxt-build-${{ hashFiles('package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-nuxt-build-
+      - name: Install dependencies
+        run: npm ci --cache .npm --prefer-offline
+      - name: Static HTML export with Nuxt
+        run: npm run generate
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: .output/public
+
+  # Deployment job
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4