Grafana, panel rendering to pdf instead of png, any settings

Hello, I am using Grafana and Grafana-image-renderer v1.0.9, both in docker variant and it works fine as expected.

My question is, are there any settings to change rendering from png to pdf ? Either in docker version or standalone Node.js application

I found below command with json config butg it does not have such a settings.

docker run -d --name=renderer --network=host -v /some/path/config.json:/usr/src/app/config.json grafana/grafana-image-renderer:latest