How Do You Get Chef to Be Automatically Installed and Configured (e.g., in a Docker Container)?

Problem scenario
You have a Docker container that supports Chef or some automatic way of installing Chef. The automation is failing at the end because you are being prompted to accept a license. What should you do to be able to invoke Chef commands automatically?

Solution
With the first Chef command, e.g., "chef env", use the "--chef-license accept" option/flag. Here is an example:

chef env --chef-license accept

For more information, see this posting.