ci: Cache node_modules

Signed-off-by: Christoph Heiss <contact@christoph-heiss.at>

.github/workflows/build.yml

@@ -13,13 +13,19 @@ jobs:
       - uses: actions/setup-node@v3
         with:
           node-version: 17
-      - run: npm clean-install
+      - uses: actions/cache@v3
+        id: cache-node-modules
+        with:
+          key: node-modules-${{ runner.os }}-${{ hashFiles('package-lock.json') }}
+          path: node_modules
+      - if: steps.cache-node-modules.outputs.cache-hit != 'true'
+        run: npm clean-install
       - run: npm run lint:scss
       - run: npm run build
 
   docker-image:
-    needs: lint-and-build
     runs-on: ubuntu-latest
+    needs: lint-and-build
     steps:
       - uses: actions/checkout@v3
       - uses: docker/setup-buildx-action@v2