Add build workflow

.github/workflows/build.yml

@@ -0,0 +1,38 @@
+name: Node.js Build
+
+on:
+  push:
+  pull_request:
+
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: 'node'
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Build
+      run: npm run build
+
+  automerge-dependabot:
+    runs-on: ubuntu-latest
+    needs: [build]
+    if: github.actor == 'dependabot[bot]' && github.event.pull_request.user.login == 'dependabot[bot]'
+
+    steps:
+    - name: Enable auto-merge for Dependabot PRs
+      run: gh pr merge --auto --merge "$PR_URL"
+      env:
+        PR_URL: ${{ github.event.pull_request.html_url }}
+        GH_TOKEN: ${{ secrets.DEPENDABOT_TOKEN }}
+        GITHUB_TOKEN: ${{ secrets.DEPENDABOT_TOKEN }}