0 0 * * * sudo /sbin/shutdown -h now

#!/bin/bash

instance_id=$(aws ec2 describe-instances --filters
"Name=tag:Name,Values=${1}"
| jq --raw-output .Reservations[].Instances[].InstanceId)
echo "Found instance_id = ${instance_id}"
aws ec2 stop-instances --instance-ids "$instance_id"
aws ec2 wait instance-stopped --instance-ids "$instance_id"
echo "Instance stopped."