Added detail to token product doc page

[alanwsmith]

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Problem/Feature

This is an update to the CLI token product docs

Description of Changes:

• CLI token product docs page updated with more details
• Added explicit notes about not putting / at the end of the OAuth Redirect URLs (which took me a while to figure out)
• Added details on using -p to change the port when you've already got something running there. This wasn't covered in the docs, but I found it in the source code. I'm running off the assumption it's something available for public use.

Checklist

• My code follows the Contribution Guide
• I have self-reviewed the changes being requested
• I have made comments on pieces of code that may be difficult to understand for other editors
• I have updated the documentation (if applicable)