Complete Theme Migration from Henrik

.github/workflows/regen-gh-pages.yml

@@ -21,7 +21,23 @@ jobs:
         uses: peaceiris/actions-hugo@v2
         with:
           hugo-version: 'latest'
+          extended: true    # Use extended Hugo
 
+      - name: Setup Node
+        uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+
+      - name: Cache dependencies
+        uses: actions/cache@v1
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+      - name: Prepare postcss-cli
+        run: npm ci
+        
       - name: Build
         run: hugo --minify