After running rails new myapp in your terminal run

rails new myapp -m ~/path_to/templates/gems/devise.rb

An example to setup devise run

rails app:template LOCATION=~/path_to/templates/gems/devise.rb

Refer to templates folder to see list of available templates

Templates for gems included:

• administrate
• bootstrap
• devise
• dotenv
• faker
• haml
• letter_opener
• oj
• pagy
• paranoia
• pundit
• rspec
• seedbank
• sidekiq
• simple_form

Templates for frontend included:

• flash
• pages