add github actions

.github/workflows/build.yml

@@ -0,0 +1,26 @@
+name: Build
+
+on:
+  pull_request:
+    branches:
+      - main
+      - "release/*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: "22"
+
+      - name: Install dependencies
+        run: yarn install
+
+      - name: Build Docusaurus site
+        run: yarn build