How we can show docker container logs to graylog

I have used sidecar and filebeat for shipping verious service logs to graylog.

Now I want to show my 2 docker container logs to graylog. Can you please tell me how I can achieve this?

Please explain with proper example.
(FYI, I am using graylog 4 and latest version of sidecar)

@kituu
Correct me if im wrong, but Is this a duplicate post?
Looks like this one here

Sorry. Yes it is duplicate. I thought I forgot hence posted again.

Can you please provide me an appropriate solution for my question?