fix(ci): set default working directory to app and cache node dependen…

…cies

.github/workflows/playwright.yml

@@ -8,13 +8,16 @@ jobs:
   test:
     timeout-minutes: 60
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./app
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: lts/*
-      - name: Switch into app directory
-        run: cd app/
+          node-version: 20
+          cache: "npm"
+          cache-dependency-path: app/package-lock.json
       - name: Install dependencies
         run: npm ci
       - name: Install Playwright Browsers