It includes :
- Puma : App server.
- Pg : The Ruby interface to the PostgreSQL RDBMS.
- Dotenv : Loads environment variables from .env file.
- Web Console : Access an interactive console on the browser for debugging.
- Awesome Print : Pretty prints Ruby objects in full color exposing their internal structure with proper indentation.
- Better Errors : Replaces the standard Rails error page with a much better and more useful error page.
- Rspec : Testing framework.
- Capybara : Adds support for system/feature testing.
- Simplecov : For code coverage reports.
- Rubocop : A static code analyzer and formatter, based on the community Ruby style guide.
- Brakeman : A static analysis security vulnerability scanner.