Health Check

A health check is a scheduled HTTP or TCP request that you can configure to run on a repeating basis to ensure that a service is healthy. For example, an HTTP health check can be configured to ping the root URL of your site and ensure that the response is HTTP 200 (OK). In the cloud control panel, you can only define the HTTP path that you would like to have checked, however advanced options can be configured in the app spec for your app.

See some common troubleshooting techniques for App Platform.
Reference for the format of app configuration files for App Platform, also known as “app specs.”