refs #69 'add group to Gemfile'
refs #69 'set the devise secret key'
refs #69 'add gem new dotenv-rails, 'dotenv-deployment'
refs #69 'display images and icons for production environment'
refs #69 'add loader.gif for the production environment'
refs #229 'modified design on the dashboard page'
refs #232 'modified sidekiq.yml'
refs #229 'add a method set_graph'
refs #69 'add a gem rspec_junit_formatter and remove a gem ci_reporter'
refs #243 'add  the confirmable function of devise'
refs #219 'bundle update'
refs #243 'add the function that sign up with an email confirmation'
refs #266 'add the function that send a confirmation mail to the email'