Authentication documentation

[rhysrevans3]

Related Issue(s):

• 273

Description:

Authentication related docker-compose files moved to examples/auth and README with explanation of different auth patterns being used added.

PR Checklist:

• [x] Code is formatted and linted (run pre-commit run --all-files)
• [x] Tests pass (run make test)
• [ ] Documentation has been updated to reflect changes, if applicable
• [ ] Changes are added to the changelog

[rhysrevans3]

@jonhealy1 @pedro-cf I've moved/added some documentation for the authentication changes let me know if I've missed anything.

[jonhealy1]

@rhysrevans3 Is this ready for review?