Echo image-exists in a different step

.github/workflows/aws_deploy.yml

@@ -52,6 +52,9 @@ jobs:
       - name: Check if image with tag already exists
         run: |
           echo "image-exists=$(if aws ecr list-images --no-paginate --repository-name=$repository --query "imageIds[*].imageTag" | grep -q ${{ github.sha }}; then echo true; else echo false; fi)" >> $GITHUB_ENV
+
+      - name: Check value of image-exists
+        run: |
           echo ${{ env.image-exists }}
 
       - name: Build, tag, and push docker image to ECR