$ aws ecr get-login-password --region ap-northeast-2
An error occurred (AccessDeniedException) when calling the GetAuthorizationToken operation: User: arn:aws:iam::646450232747:user/CLONET is not authorized to perform: ecr:GetAuthorizationToken on resource: * because no identity-based policy allows the ecr:GetAuthorizationToken action
AmazonECSTaskExecutionRolePolicy를 추가한다.