[add] initial commit

Gemfile

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+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+ruby '2.7.2'
+
+# Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
+gem 'rails', '~> 6.1.2', '>= 6.1.2.1'
+# Use sqlite3 as the database for Active Record
+gem 'sqlite3', '~> 1.4'
+# Use Puma as the app server
+gem 'puma', '~> 5.0'
+# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
+# gem 'jbuilder', '~> 2.7'
+
+# Use Active Storage variant
+# gem 'image_processing', '~> 1.2'
+
+# Reduces boot times through caching; required in config/boot.rb
+gem 'bootsnap', '>= 1.4.4', require: false
+
+# Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
+# gem 'rack-cors'
+
+group :development, :test do
+  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
+  gem 'byebug', platforms: %i[mri mingw x64_mingw]
+  gem 'rspec-rails', '~> 4.0'
+end
+
+group :test do
+  gem 'database_cleaner', '~> 2.0'
+  gem 'factory_bot_rails', '~> 6.1'
+  gem 'faker', '~> 2.16'
+  gem 'shoulda-matchers', '~> 4.5'
+end
+
+group :development do
+  gem 'listen', '~> 3.3'
+  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
+  gem 'spring'
+end
+
+# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
+gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]
+
+# project dependencies
+gem 'bcrypt', '~> 3.1' # secret storage
+gem 'jbuilder', '~> 2.11' # json
+gem 'ruby-enum', '~> 0.9.0' # enum