Add note in README file #713
Description
What would you like to be documented:
In README file under Installation and usage, there might be a need to add a note for the requirement of running docker as a non root user (running without sudo).
Good idea to add a link too.
Why is this needed:
As a new user when I was trying to run kind create cluster, I got an error "Error: could not list clusters: invalid output when listing nodes: WARNING: Error loading config file: /home/necuser/.docker/config.json: open /home/necuser/.docker/config.json: permission denied" and thus get a little confusing.