This is an update for the Jenkins image.
In our upcoming demo video, I used a jenkins image which is now deprecated. Instead of that, we have to use jenkins/jenkins.

In the demo video, I used the command:-

docker run jenkins

But as of now, we have to use the following command:-

docker run jenkins/jenkins

Reference:-
https://www.jenkins.io/blog/2018/12/10/the-official-Docker-image/
https://hub.docker.com/r/jenkins/jenkins/