Your Site Reliability Engineering (SRE) team oversees monitoring and logging for applications deployed across various resources, including Compute Engine and Google Kubernetes Engine (GKE), in Production Projects. A centralized monitoring dashboard has been established in the monitoring Project to aggregate metrics from all production Projects. An uptime check is in place for these applications. You are now required to configure Notification channels for one of the applications to dispatch notifications to a public endpoint. Which of the following options fulfills this requirement?