Configure Elastic BeanStalk Notification using .ebextensions

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"

    }

  ]

}