ci: add automated Trivy security scanning via GitHub Actions

- Add a GitHub Action workflow to perform Trivy security scans on the repository
- Configure scheduled, push, and pull request triggers for the scan
- Upload vulnerability scan results to the GitHub Security tab in SARIF format
- Include additional scan step with table output and failure on detected vulnerabilities

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Author: appleboy

.github/workflows/trivy-scan.yml

@@ -0,0 +1,51 @@
+name: Trivy Security Scan
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+  workflow_dispatch:
+
+jobs:
+  trivy-scan:
+    name: Trivy Security Scan
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write
+      actions: read
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Run Trivy vulnerability scanner in repo mode
+        uses: aquasecurity/trivy-action@0.33.1
+        with:
+          scan-type: 'fs'
+          scan-ref: '.'
+          scanners: 'vuln,secret,misconfig'
+          format: 'sarif'
+          output: 'trivy-results.sarif'
+          severity: 'CRITICAL,HIGH,MEDIUM'
+
+      - name: Upload Trivy results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v3
+        if: always()
+        with:
+          sarif_file: 'trivy-results.sarif'
+
+      - name: Run Trivy vulnerability scanner (table format)
+        uses: aquasecurity/trivy-action@0.33.1
+        with:
+          scan-type: 'fs'
+          scan-ref: '.'
+          scanners: 'vuln,secret,misconfig'
+          format: 'table'
+          severity: 'CRITICAL,HIGH,MEDIUM'
+          exit-code: '1'