From 8c969b6bbfecbac8b9f231c82a00c334e6e17d33 Mon Sep 17 00:00:00 2001
From: Xi Xu <i@xi-xu.me>
Date: Tue, 19 Aug 2025 21:11:16 +0800
Subject: [PATCH] Update Docker workflow to use image digest for Trivy scan

Adds outputs for image tags and digest in the build-and-push job and updates the Trivy scanner to reference the image by digest instead of the latest tag. This ensures the vulnerability scan is performed on the exact built image.
---
 .github/workflows/docker.yml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 4daf097..119d8f8 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -19,6 +19,9 @@ env:
 jobs:
   build-and-push:
     runs-on: ubuntu-latest
+    outputs:
+      image-tags: ${{ steps.meta.outputs.tags }}
+      image-digest: ${{ steps.build-and-push.outputs.digest }}
     permissions:
       contents: read
       packages: write
@@ -86,7 +89,7 @@ jobs:
       - name: Run Trivy vulnerability scanner
         uses: aquasecurity/trivy-action@master
         with:
-          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ needs.build-and-push.outputs.image-digest }}
           format: 'sarif'
           output: 'trivy-results.sarif'