Trialling using the Playwright docker image to see if it improves speed

.github/workflows/playwright.yml

@@ -7,6 +7,8 @@ jobs:
   test:
     timeout-minutes: 5
     runs-on: ubuntu-latest
+    container:
+      image: mcr.microsoft.com/playwright:v1.48.1-jammy
     env:
       CI: true
     steps:
@@ -16,8 +18,6 @@ jobs:
           node-version-file: '.node-version'
       - name: Install dependencies
         run: npm ci
-      - name: Install Playwright Browsers
-        run: npx playwright install --with-deps
       - name: Run Playwright tests
         run: npx playwright test --project=ci
       - uses: actions/upload-artifact@v4