Add caching to CI

Author: JulianKniephoff

.github/workflows/deploy.yml

@@ -19,6 +19,13 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v6
+      - name: Cache npm dependencies
+        uses: actions/cache@v5
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ hashFiles('package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
       - run: npm ci
       - run: npm run build
       - name: Disable Jykell