Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
Thanks for reaching here! It looks like Container crash. This can happen at two times.
- At container startup : When we start your container, we'll wait a while for it to start and initialize. We consider the startup to be successful once the container is running and once we get a response from it to a Platform generated HTTP ping so that we know it's ready to respond to HTTP traffic. We'll wait 230 seconds for that to happen. If we don't have a successful start within 230 seconds, we'll assume there's a problem and we'll stop the container.
- During runtime: Your app container was running but due to an unhandled exception it exited unexpectedly.
As per findings your app started but did not respond to health checks. This means that our App Service infrastructure has tried pinging the container every second until it responds, indicating that the HTTP server is up.
Could you please configure that, add an app setting called WEBSITES_CONTAINER_START_TIME_LIMIT and set it to the number of seconds you would like for us to wait for your container to start (up to a maximum of 1800) as shown in the image below.

Also suggest viewing the Application Logs to see if there was any exception or error message indicating the possible cause.
Please review the following article that might help you customize and configure your Web App to your requirements https://learn.microsoft.com/en-us/azure/app-service/containers/configure-language-nodejs
Check this article link might be helpful: https://learn.microsoft.com/en-us/archive/blogs/waws/things-you-should-know-web-apps-and-linux#general-information
Let us know if further query or issue remains.