feat: added conditional paramter for blocking action (#151)

Author: VishwajitNagulkar

.github/workflows/docker-scanner.yml

@@ -16,6 +16,10 @@ on:
         default: false
         type: string
         description: "Enable image scan report upload to GitHub Security tab."
+      block_action:
+        default: false
+        type: string
+        description: "Block github action if severity detected."
 
 jobs:
   build-image:
@@ -60,6 +64,7 @@ jobs:
           sarif_file: 'trivy-results.sarif'
 
       - name: Docker Scan with trivy (blocking)
+        if: ${{ inputs.block_action == true }}
         uses: aquasecurity/trivy-action@master
         with:
           image-ref: ${{ github.sha }}