Add build workflow

Signed-off-by: Peter Zhu <zhujiaxi@amazon.com>

Author: peterzhuamazon

.github/workflows/build.yml

@@ -0,0 +1,23 @@
+---
+name: build app
+
+on: [push, pull_request]
+
+jobs:
+  build-test:
+    strategy:
+      matrix:
+        node-version:
+          - 18
+          - 20
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up node-${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install dependencies and build the code
+        run: |
+          npm install
+          npm run build