add the missing gemfiles

gemfiles/6.1.gemfile

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+gemspec path: '../'
+
+gem 'rails', '~> 6.1.0'
+
+group :development, :test do
+  gem 'autoprefixer-rails', '~> 10.4.16.0'
+  gem 'byebug',             '~> 11.1.0', platforms: %i[mri mingw x64_mingw]
+  gem 'image_processing',   '>= 1.12.0'
+  gem 'sqlite3',            '~> 1.6.7'
+end
+
+group :test do
+  gem 'brakeman',                 '~> 6.1.2'
+  gem 'bundler-audit',            '~> 0.9.1'
+  gem 'coveralls_reborn',         '~> 0.28.0', require: false
+  gem 'cuprite',                  '>= 0.15'
+  gem 'equivalent-xml',           '~> 0.6.0'
+  gem 'minitest',                 '>= 5.23.0'
+  gem 'minitest-reporters',       '>= 1.6.1'
+  gem 'mocha',                    '>= 2.3.0', require: false
+  gem 'rails-controller-testing', '~> 1.0.5'
+  gem 'rubocop',                  '~> 1.63.0', require: false
+  gem 'rubocop-minitest'
+  gem 'rubocop-rails'
+  gem 'simplecov', '~> 0.22.0', require: false
+end

gemfiles/7.0.gemfile

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+gemspec path: '../'
+
+gem 'rails', '~> 7.0.0'
+
+group :development, :test do
+  gem 'autoprefixer-rails', '~> 10.4.16.0'
+  gem 'byebug',             '~> 11.1.0', platforms: %i[mri mingw x64_mingw]
+  gem 'image_processing',   '>= 1.12.0'
+  gem 'sqlite3',            '~> 1.6.7'
+end
+
+group :test do
+  gem 'brakeman',                 '~> 6.1.2'
+  gem 'bundler-audit',            '~> 0.9.1'
+  gem 'coveralls_reborn',         '~> 0.28.0', require: false
+  gem 'cuprite',                  '>= 0.15'
+  gem 'equivalent-xml',           '~> 0.6.0'
+  gem 'minitest',                 '>= 5.23.0'
+  gem 'minitest-reporters',       '>= 1.6.1'
+  gem 'mocha',                    '>= 2.3.0', require: false
+  gem 'rails-controller-testing', '~> 1.0.5'
+  gem 'rubocop',                  '~> 1.63.0', require: false
+  gem 'rubocop-minitest'
+  gem 'rubocop-rails'
+  gem 'simplecov', '~> 0.22.0', require: false
+end

gemfiles/7.1.gemfile

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+gemspec path: '../'
+
+gem 'rails', '~> 7.1.0', '>= 7.1.1'
+
+group :development, :test do
+  gem 'autoprefixer-rails', '~> 10.4.16.0'
+  gem 'byebug',             '~> 11.1.0', platforms: %i[mri mingw x64_mingw]
+  gem 'image_processing',   '>= 1.12.0'
+  gem 'sqlite3',            '~> 1.6.7'
+end
+
+group :test do
+  gem 'brakeman',                 '~> 6.1.2'
+  gem 'bundler-audit',            '~> 0.9.1'
+  gem 'coveralls_reborn',         '~> 0.28.0', require: false
+  gem 'cuprite',                  '>= 0.15'
+  gem 'equivalent-xml',           '~> 0.6.0'
+  gem 'minitest',                 '>= 5.23.0'
+  gem 'minitest-reporters',       '>= 1.6.1'
+  gem 'mocha',                    '>= 2.3.0', require: false
+  gem 'rails-controller-testing', '~> 1.0.5'
+  gem 'rubocop',                  '~> 1.63.0', require: false
+  gem 'rubocop-minitest'
+  gem 'rubocop-rails'
+  gem 'simplecov', '~> 0.22.0', require: false
+end