https://fusionauth.io/docs/v1/tech/themes/#handling-failures

It's not responding at the port 9011, like it should.
Is there a way to test or ping the FusionAuth App to make sure its up and running other than using docker ps -a?

Yes, there are several ways to test or ping the FusionAuth App to check if it's up and running without relying on the docker ps -a command. Here are a few alternative methods:

Curl or wget: You can use the curl or wget command-line tools to send a request to the FusionAuth App's endpoint and check the response. For example, you can run curl http://localhost:9011 or wget http://localhost:9011 to send a GET request to the FusionAuth App running on port 9011. If you receive a valid response, it indicates that the app is up and running.

Telnet: You can use the telnet command to establish a connection to the FusionAuth App's port and check if it's open and responsive. Run telnet localhost 9011 to attempt a connection to the FusionAuth App on port 9011. If the connection is successful, it means the app is running and accepting connections.

Browser access: Simply open a web browser and enter the URL http://localhost:9011 to access the FusionAuth App. If the app is running correctly, you should be able to see the login or landing page.

API client: If the FusionAuth App provides an API, you can use an API client like Postman or cURL to send a request to the API endpoints and verify if you receive the expected responses.

These methods allow you to test the availability and responsiveness of the FusionAuth App without relying on the docker ps -a command or using Docker-specific tools.