add audit workflow

.github/workflows/audit.yml

@@ -0,0 +1,35 @@
+name: Audit
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '**.md'
+  pull_request:
+    paths-ignore:
+      - '**.md'
+
+jobs:
+
+  build:
+    name: Audit
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Set Node.js 20.x
+      uses: actions/setup-node@v3
+      with:
+        node-version: 20.x
+
+    - name: npm install
+      run: npm install
+
+    - name: Build
+      run: npm run build
+
+    - name: Audit
+      run: npm audit --audit-level=moderate