add epoch timestamp to allow rebuilding on same sha

Author: craignuj

.github/workflows/deploy.yml

@@ -40,5 +40,5 @@ jobs:
           ECR_REPOSITORY: 'ssh_bastion'
           IMAGE_TAG: latest
         run: |
-          docker build -t "$ECR_REGISTRY/$ECR_REPOSITORY:latest" -t "$ECR_REGISTRY/$ECR_REPOSITORY:${{ github.sha }}"
+          docker build -t "$ECR_REGISTRY/$ECR_REPOSITORY:latest" -t "$ECR_REGISTRY/$ECR_REPOSITORY:${{ github.sha }}_$(date +%s)"
           docker push "$ECR_REGISTRY/$ECR_REPOSITORY" --all-tags