12.2.3. Webhook POST
An HTTP POST call will be made to the specified URL with the event’s data (see above for each event’s data format).
When the URL is HTTPS, the call will have an SSL client certificate set from Quay.io. Verification of this certificate will prove the call originated from Quay.io. Responses with status codes in the 2xx range are considered successful. Responses with any other status codes will be considered failures and result in a retry of the webhook notification.