adding external image mirroring step to the workflow

Author: MmagdyHafezZ

.github/workflows/build-images.yml

@@ -405,6 +405,20 @@ jobs:
             trivy-container-${{ matrix.service }}.sarif
           retention-days: 30
 
+      - name: Trigger external image mirror
+        if: steps.changes.outputs.needs_build == 'true'
+        run: |
+          curl -X POST \
+            -H "Authorization: token ${{ secrets.GH_TOKEN_MIRROR_TO_ICR }}" \
+            -H "Accept: application/vnd.github.v3+json" \
+            https://api.github.com/repos/ibm-skills-network/security-compliance-automation/actions/workflows/build-external-images.yml/dispatches \
+            -d '{
+                "ref": "main",
+                "inputs": {
+                  "image": "ghcr.io/${{ github.repository }}/mark-${{ matrix.service }}:${{ env.IMAGE_TAG }}"
+                }
+              }'
+
       - name: Generate security summary
         if: always() && steps.changes.outputs.needs_build == 'true'
         run: |