add github action for .docusaurus cache

Author: ReneWerner87

.github/workflows/deploy.yaml

@@ -30,6 +30,14 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
+      - name: Cache .docusaurus
+        uses: actions/cache@v4
+        with:
+          path: .docusaurus
+          key: ${{ runner.os }}-docusaurus-${{ hashFiles('**/*') }}
+          restore-keys: |
+            ${{ runner.os }}-docusaurus-
+
       - name: Build website
         run: npm run build