How to configure client logs when using the Docker image in a kubernetes cluster

I followed the article above to configure Tailscale (as a sample sidecar) on GCP kubernetes cluster, and I notice that the the logging seems to be directed to stderr by default (when looking at GCP logging, the tailscale pod’s logging output is contained in error logs).

How can I configure the logging so that it outputs to regular logs instead of error logs since there is no issues with the Tailscale service?

Only found the following article regarding the option to not log, which is not what I want: Logging, auditing, and streaming · Tailscale