How to change the default Rails application template configuration?

Question

Ruby on Rails

I want the Gems I need to be installed when creating a new Rails project, and as a standard Slim template engine, not erb - how can this be done?
At the moment, I have to configure the Gemfile to install the necessary gems via bundle install, after which everything seems to be ok (when creating a new controller, the files contain the Slim extension in views, but in layouts instead of application.slim there is a standard application.html.erb What settings are used by Rails when a new application is created, obviously by some standard gem file.

Answer 1

Something like this:
guides.rubyonrails.org/rails_application_templates.html
rusrails.ru/generators

Answer 2

railsbricks.net is nothing like a template, but I used it and stopped, well, it. It's better to know what's inside right away.

Answer 3

Convenient interactive rails application template.
If not satisfied, then there is a choice