[Basic Authentication] - add devise

[kkimberley]

@GGD could you please help me to review the code if you have the time, thank you.

[GGD]

mostly are ok, could be better by removing the unnecessary code like test.

Or you can do further:

# in config/application.rb,
# remove require 'rails/all' and add following:

require "rails"
# Pick the frameworks you want:
require "active_model/railtie"
require "active_job/railtie"
require "active_record/railtie"
require "action_controller/railtie"
require "action_mailer/railtie"
require "action_view/railtie"
require "action_cable/engine"
require "sprockets/railtie"
# require "rails/test_unit/railtie"

[kkimberley]

update already.