1. Create a SNS topic
2. Subscribe to that topic (e.g. via email)
3. Use that topic's ARN in .ebextensions. See the following example
{
"option_settings": [
{
"namespace": "aws:elasticbeanstalk:sns:topics",
"option_name": "Notification Topic ARN",
"value": "arn:aws:sns:eu-west-2:YOURACCOUNTID:NAMEOFTOPIC"
}
]
}
