feat: support preview

.github/workflows/preview-site.yml

@@ -1,12 +1,17 @@
 # 文件名建议统一为 preview-publish
 # 应用 preview.yml 的 demo
 name: preview site
-on: [pull_request]
+on:
+  pull_request:
+    branches: [main]
 
 jobs:
   build-site:
     runs-on: ubuntu-latest
     steps:
+      - uses: pnpm/action-setup@v3
+        with:
+          version: 8
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with:
@@ -23,7 +28,7 @@ jobs:
             ${{ runner.os }}-
       - run: pnpm install
       - name: build-site
-        run: pnpm run site:preview
+        run: npm run site:preview
   call-preview:
     uses: Tencent/tdesign/.github/workflows/preview.yml@main
     secrets: