feat(ci): add trivy workflow

Author: jsjoeio

.github/workflows/trivy.yml

@@ -0,0 +1,58 @@
+name: "Trivy - Scan for vulnerabilities"
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [main]
+  schedule:
+    # Runs every Monday morning PST
+    - cron: "17 15 * * 1"
+
+jobs:
+  scan-repo:
+    name: Scan repository
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout code
+      - uses: actions/checkout@v2
+
+      - name: Run Trivy vulnerability scanner in repo mode
+        uses: aquasecurity/trivy-action@master
+        with:
+          scan-type: 'fs'
+          format: 'template'
+          template: '@/contrib/sarif.tpl'
+          output: 'trivy-repo-results.sarif'
+          severity: 'CRITICAL'
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v1
+        with:
+          sarif_file: 'trivy-repo-results.sarif'
+
+  scan-image:
+    name: Scan Docker image
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout code
+      - uses: actions/checkout@v2
+
+      - name: Build an image from Dockerfile
+        run: |
+          docker build -t codercom/code-server:${{ github.sha }} --file ./ci/release-image/Dockerfile .
+
+      - name: Run Trivy vulnerability scanner in image mode
+        uses: aquasecurity/trivy-action@master
+        with:
+          scan-type: 'image'
+          format: 'template'
+          template: '@/contrib/sarif.tpl'
+          output: 'trivy-image-results.sarif'
+          severity: 'CRITICAL'
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v1
+        with:
+          sarif_file: 'trivy-image-results.sarif'