feat: preview prs

.github/workflows/preview.yml

@@ -0,0 +1,36 @@
+name: Deploy PR previews
+concurrency: preview-${{ github.ref }}
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - closed
+jobs:
+  deploy-preview:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+
+      - name: Install
+        run: npm ci
+
+      - name: Build
+        run: npm run build --if-present
+
+      - uses: rossjrw/pr-preview-action@v1
+        with:
+          source-dir: .
+          preview-branch: gh-pages
+          umbrella-dir: pr-preview
+          action: auto