add snyk scan workflow

Author: FuhuXia

.github/workflows/snyk.yml

@@ -0,0 +1,36 @@
+name: Snyk Scan
+
+on:
+  pull_request:
+    branches: [ main ]
+  schedule:
+    - cron: '0 5 * * *'  # Run at midnight Eastern Time every day (midnight EST/1 AM EDT)
+  workflow_dispatch:  # Allow manual triggering
+
+jobs:
+  snyk:
+    name: Snyk Scan
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: 'package.json'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Install Snyk CLI
+        run: npm install -g snyk
+
+      - name: Authenticate Snyk
+        run: snyk auth ${{ secrets.SNYK_TOKEN }}
+
+      - name: Run Snyk test for vulnerabilities
+        run: snyk test --severity-threshold=high
+        continue-on-error: true