Publish up-to-date image for compliance checks (#986)

* Build image when main is pushed

* Add tags for latest and previous images

Author: toothstone

.github/workflows/build-docker.yml

@@ -3,6 +3,11 @@ name: Build and publish scs-compliance-check Docker image
 'on':
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
+  push:
+    branches:
+    - main
+    paths:
+      - 'Tests/**'
 
 env:
   REGISTRY: ghcr.io
@@ -31,6 +36,10 @@ jobs:
         uses: docker/metadata-action@v5
         with:
           images: ${{ env.REGISTRY }}/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest
+            type=ref,event=branch
+            type=sha
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v5