ci: use pnpm, deprecated npm & yarn

.github/workflows/nuxtjs.yml

@@ -31,47 +31,20 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Detect package manager
-        id: detect-package-manager
-        run: |
-          if [ -f "${{ github.workspace }}/yarn.lock" ]; then
-            echo "manager=yarn" >> $GITHUB_OUTPUT
-            echo "command=install" >> $GITHUB_OUTPUT
-            exit 0
-          elif [ -f "${{ github.workspace }}/package.json" ]; then
-            echo "manager=npm" >> $GITHUB_OUTPUT
-            echo "command=ci" >> $GITHUB_OUTPUT
-            exit 0
-          else
-            echo "Unable to determine package manager"
-            exit 1
-          fi
-      - name: Setup Node
-        uses: actions/setup-node@v4
+      # https://pnpm.io/continuous-integration#github-actions
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
         with:
-          node-version: "20"
-          cache: ${{ steps.detect-package-manager.outputs.manager }}
-      # - name: Setup Pages
-      #   uses: actions/configure-pages@v5
-      #   with:
-      #     # Automatically inject router.base in your Nuxt configuration file and set
-      #     # target to static (https://nuxtjs.org/docs/configuration-glossary/configuration-target/).
-      #     #
-      #     # You may remove this line if you want to manage the configuration yourself.
-      #     static_site_generator: nuxt
-      - name: Restore cache
-        uses: actions/cache@v4
+          version: 9
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
         with:
-          path: |
-            dist
-            .nuxt
-          key: ${{ runner.os }}-nuxt-build-${{ hashFiles('dist') }}
-          restore-keys: |
-            ${{ runner.os }}-nuxt-build-
+          node-version: ${{ matrix.node-version }}
+          cache: 'pnpm'
       - name: Install dependencies
-        run: ${{ steps.detect-package-manager.outputs.manager }} ${{ steps.detect-package-manager.outputs.command }}
+        run: pnpm install
       - name: Static HTML export with Nuxt
-        run: ${{ steps.detect-package-manager.outputs.manager }} run generate-static
+        run: pnpm run generate-static
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with: