Adds trivy scheduled checks

.github/workflows/trivy.yml

@@ -0,0 +1,34 @@
+name: trivy scan
+
+on:
+  # Enable manually triggering this workflow via the API or web UI
+  workflow_dispatch:
+  schedule:
+    # At 10:00 UTC on every day-of-week from Monday through Friday.
+    - cron:  '0 10 * * 1-5'
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    permissions:
+      contents: read # for actions/checkout to fetch code
+      security-events: write # for github/codeql-action/upload-sarif to upload SARIF results
+      actions: read # only required for a private repository by github/codeql-action/upload-sarif to get the Action run status
+    name: Build
+    runs-on: ubuntu-latest
+    if: github.repository == 'grafana/k6' # avoid running on forks
+    steps:
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@22d2755f774d925b191a185b74e782a4b0638a41
+        with:
+          image-ref: 'grafana/k6:master'
+          format: 'sarif'
+          output: 'trivy-results.sarif'
+          severity: 'CRITICAL,HIGH,MEDIUM'
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v2
+        with:
+          sarif_file: 'trivy-results.sarif'