Add Trivy security scan workflow and README badge

.github/workflows/trivy.yml

@@ -0,0 +1,129 @@
+name: Trivy
+
+on:
+  push:
+    branches: [ "main", "develop" ]
+  pull_request:
+    branches: [ "develop" ]
+  # New CVEs land in the database without any commit here, so the badge
+  # is refreshed against the current state of develop once a week.
+  schedule:
+    - cron: '0 4 * * 1'
+  workflow_dispatch:
+
+# Nothing by default; each job asks for exactly what it needs.
+permissions: {}
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  IMAGE: grandnode2:trivy
+
+jobs:
+  # NuGet (Directory.Packages.props) and npm (package-lock.json) dependencies,
+  # Dockerfile misconfiguration and committed secrets.
+  repository:
+    name: Scan repository
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      security-events: write   # upload SARIF to code scanning
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      # Every finding goes to the Security tab; this step never fails the job.
+      - name: Trivy filesystem scan (SARIF)
+        uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
+        with:
+          scan-type: fs
+          scan-ref: .
+          scanners: vuln,misconfig,secret
+          format: sarif
+          output: trivy-fs.sarif
+
+      # A pull request from a fork gets a read-only token and cannot upload.
+      - name: Upload SARIF
+        if: ${{ !cancelled() && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) }}
+        uses: github/codeql-action/upload-sarif@24c54180a607b1449ed407dd24f251e4e9147c8d # v4.38.3
+        with:
+          sarif_file: trivy-fs.sarif
+          category: trivy-fs
+
+      # The gate behind the badge: fixable HIGH and CRITICAL findings only.
+      - name: Trivy filesystem gate
+        uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
+        with:
+          scan-type: fs
+          scan-ref: .
+          scanners: vuln,misconfig,secret
+          severity: HIGH,CRITICAL
+          ignore-unfixed: true
+          format: table
+          exit-code: '1'
+          skip-setup-trivy: true
+
+  # The image as the Dockerfile builds it: base OS packages plus the published app.
+  image:
+    name: Scan Docker image
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      security-events: write   # upload SARIF to code scanning
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@f87e5991a6d7451dcb8d9637bfbc97413f497069 # v4.4.1
+
+      - name: Build Docker image
+        uses: docker/build-push-action@c3c9e263c25d99ce0380d002d59b67737d91b0dc # v7.4.0
+        with:
+          context: .
+          load: true
+          push: false
+          build-args: |
+            GIT_COMMIT=${{ github.sha }}
+            GIT_BRANCH=${{ github.ref_name }}
+          tags: ${{ env.IMAGE }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Trivy image scan (SARIF)
+        uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
+        with:
+          scan-type: image
+          image-ref: ${{ env.IMAGE }}
+          scanners: vuln,secret
+          format: sarif
+          output: trivy-image.sarif
+
+      - name: Upload SARIF
+        if: ${{ !cancelled() && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) }}
+        uses: github/codeql-action/upload-sarif@24c54180a607b1449ed407dd24f251e4e9147c8d # v4.38.3
+        with:
+          sarif_file: trivy-image.sarif
+          category: trivy-image
+
+      - name: Trivy image gate
+        uses: aquasecurity/trivy-action@ed142fd0673e97e23eac54620cfb913e5ce36c25 # v0.36.0
+        with:
+          scan-type: image
+          image-ref: ${{ env.IMAGE }}
+          scanners: vuln,secret
+          severity: HIGH,CRITICAL
+          ignore-unfixed: true
+          format: table
+          exit-code: '1'
+          skip-setup-trivy: true

README.md

@@ -33,6 +33,7 @@
 [![Tests on Linux, macOS and Windows](https://github.com/grandnode/grandnode2/actions/workflows/aspnetcore.yml/badge.svg)](https://github.com/grandnode/grandnode2/actions/workflows/aspnetcore.yml)
 [![Docker Image CI](https://github.com/grandnode/grandnode2/actions/workflows/docker-image.yml/badge.svg)](https://github.com/grandnode/grandnode2/actions/workflows/docker-image.yml)
 [![CodeQL Advanced](https://github.com/grandnode/grandnode2/actions/workflows/codeql.yml/badge.svg)](https://github.com/grandnode/grandnode2/actions/workflows/codeql.yml)
+[![Trivy](https://github.com/grandnode/grandnode2/actions/workflows/trivy.yml/badge.svg?branch=develop)](https://github.com/grandnode/grandnode2/actions/workflows/trivy.yml)
 
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