Solution for issue #18

.browserslistrc

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+defaults

.gitattributes

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+# See https://git-scm.com/docs/gitattributes for more about git attribute files.
+
+
+# Mark the yarn lockfile as having been generated.
+yarn.lock linguist-generated
+
+# Mark any vendored files as having been vendored.
+vendor/* linguist-vendored

.gitignore

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+# See https://help.github.com/articles/ignoring-files for more about ignoring files.
+#
+# If you find yourself ignoring temporary files generated by your text editor
+# or operating system, you probably want to add a global ignore instead:
+#   git config --global core.excludesfile '~/.gitignore_global'
+
+# Ignore bundler config.
+/.bundle
+
+# Ignore all logfiles and tempfiles.
+/log/*
+/tmp/*
+!/log/.keep
+!/tmp/.keep
+
+# Ignore pidfiles, but keep the directory.
+/tmp/pids/*
+!/tmp/pids/
+!/tmp/pids/.keep
+
+
+/public/assets
+.byebug_history
+
+# Ignore master key for decrypting credentials and more.
+/config/master.key
+
+
+/node_modules/*
+
+/public/packs
+/public/packs-test
+/node_modules
+/yarn-error.log
+yarn-debug.log*
+.yarn-integrity

.pryrc

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+# frozen_string_literal: true
+
+if defined?(PryByebug)
+  Pry.commands.alias_command 'c', 'continue'
+  Pry.commands.alias_command 's', 'step'
+  Pry.commands.alias_command 'n', 'next'
+  Pry.commands.alias_command 'f', 'finish'
+end
+
+# Hit Enter to repeat last command
+Pry::Commands.command /^$/, 'repeat last command' do
+  pry_instance.run_command Pry.history.to_a.last
+end

.rspec

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+--require spec_helper

.rubocop.yml

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+require: 
+  - rubocop-rails
+  - rubocop-rspec
+
+AllCops:
+  NewCops: enable
+  Exclude:
+    - 'db/**/*'
+    - 'script/**/*'
+    - 'bin/**/*'
+
+Style/Documentation:
+  Enabled: false
+
+Metrics/BlockLength:
+  Exclude:
+    - 'spec/**/*_spec.rb'
+    - 'config/**/*'

.ruby-version

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+ruby-3.0.1

Dockerfile

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+FROM ruby:3.0.1-alpine as os
+
+ARG BUILD_PACKAGES="build-base g++ gcc make git"
+RUN gem install bundler:2.2.15 && \
+    bundle config --global --jobs `expr $(grep processor /proc/cpuinfo | wc -l) - 1` && \
+    bundle config build.nokogiri --use-system-libraries && \
+    apk update && \
+    apk add --update --no-cache libxslt-dev ${BUILD_PACKAGES} less nodejs \
+    yarn nginx tzdata curl openssl tar
+
+
+
+FROM os as gems
+
+COPY Gemfile .
+COPY Gemfile.lock .
+COPY package.json .
+
+RUN bundle install && \
+    apk del build-base g++ gcc make git && \
+    rm -r /var/cache/apk/*
+
+
+
+FROM gems
+
+ARG PORT=3000
+
+ENV TZ America/Sao_Paulo
+ENV LANG en_US.UTF-8
+ENV LANGUAGE en_US.UTF-8
+ENV APP_PATH /app
+
+WORKDIR $APP_PATH
+EXPOSE $PORT
+
+COPY . $APP_PATH
+
+RUN yarn install
+RUN bundle exec rails webpacker:install
+
+CMD ["./scripts/web.sh"]

Gemfile

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+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+ruby '3.0.1'
+
+# Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
+gem 'rails', '~> 6.1.3', '>= 6.1.3.2'
+# Use Puma as the app server
+gem 'puma', '~> 5.0'
+# Use SCSS for stylesheets
+gem 'sass-rails', '>= 6'
+# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
+gem 'webpacker', '~> 5.0'
+# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
+gem 'turbolinks', '~> 5'
+# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
+gem 'jbuilder', '~> 2.7'
+# Use Active Model has_secure_password
+# gem 'bcrypt', '~> 3.1.7'
+
+# Reduces boot times through caching; required in config/boot.rb
+gem 'bootsnap', '>= 1.4.4', require: false
+
+group :development, :test do
+  gem 'pry-byebug', '~> 3.9.0'
+  gem 'rspec-rails', '~> 5.0.1', require: false
+  gem 'rubocop', '~> 1.14.0', require: false
+  gem 'rubocop-performance', '~> 1.11.3', require: false
+  gem 'rubocop-rails', '~> 2.10.1', require: false
+  gem 'rubocop-rspec', '~> 2.3.0', require: false
+end
+
+group :development do
+  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
+  gem 'web-console', '>= 4.1.0'
+  # Display performance information such as SQL time and flame graphs for each request in your browser.
+  # Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
+  gem 'listen', '~> 3.3'
+  gem 'rack-mini-profiler', '~> 2.0'
+  # 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]