fix(ci): standalone timing out during build

.github/workflows/playwright.yml

@@ -97,6 +97,9 @@ jobs:
             os: ubuntu-24.04-arm
     runs-on: ${{ matrix.os }}
     name: Standalone E2E tests on ${{ matrix.name }}
+    env:
+      TRILIUM_DOCKER: 1
+      TRILIUM_PORT: 8082
     steps:
       - uses: actions/checkout@v6
         with:
@@ -115,6 +118,15 @@ jobs:
       - name: Install Playwright browsers
         run: pnpm exec playwright install --with-deps
 
+      - name: Build standalone
+        run: pnpm --filter client-standalone build
+
+      - name: Start standalone preview server
+        run: |
+          cd apps/client-standalone
+          pnpm vite preview --port $TRILIUM_PORT &
+          sleep 5
+
       - name: Standalone end-to-end tests
         run: pnpm --filter client-standalone e2e