fix: refactor the command to match upstream's

[DnPlas]

The command was incorrectly formatted, resulting in an error: Error: No application module specified.
This commit ensures the command actually runs as it is expected from the upstream image.

Testing instructions

Prerequisites:

• skopeo
• docker

1. Build the rock rockcraft pack -v
2. Save the rock as an OCI image in docker's local registry skopeo --insecure-policy copy oci-archive:<rock name>.rock docker-daemon:jwa:0.1
3. Run a container with the image and replace the entrypoint with a shell docker run --rm -ti jwa:0.1
4. Ensure the service gets started correctly. NOTE: Because the container image needs kubeconfig and proper expose of a the serving port, the output of the command could have the following errors:

kubernetes.config.config_exception.ConfigException: Service host/port is not set.
kubernetes.config.config_exception.ConfigException: Invalid kube-config file. No configuration found.