I set variables on "Add variables" and write it, but I was failed run pipeline.
for example,
> Add variables
Name : ACCOUNT_ID, AWS_REGION
> yml file
- IMAGE="$ACCOUNT_ID.dkr.ecr.$AWS_REGION.amazonaws.com/biblely-back"
> build console message
The push refers to repository [$ACCOUNT_ID.dkr.ecr.$AWS_REGION.amazonaws.com/biblely-back]