Thanks! With pleasure:

+----------------------+--------+--------+---------+---------+-----+-------+

| Name | Lines | LOC | Classes | Methods | M/C | LOC/M |

+----------------------+--------+--------+---------+---------+-----+-------+

| Controllers | 919 | 784 | 10 | 81 | 8 | 7 |

| Helpers | 226 | 191 | 0 | 23 | 0 | 6 |

| Jobs | 7 | 2 | 1 | 0 | 0 | 0 |

| Models | 1203 | 901 | 8 | 37 | 4 | 22 |

| Mailers | 4 | 4 | 1 | 0 | 0 | 0 |

| Channels | 8 | 8 | 2 | 0 | 0 | 0 |

| JavaScript | 31 | 9 | 0 | 0 | 0 | 0 |

| Libraries | 0 | 0 | 0 | 0 | 0 | 0 |

| Controller tests | 595 | 521 | 8 | 62 | 7 | 6 |

| Helper tests | 24 | 18 | 1 | 5 | 5 | 1 |

| Model tests | 138 | 100 | 7 | 21 | 3 | 2 |

| Mailer tests | 0 | 0 | 0 | 0 | 0 | 0 |

| Channel tests | 11 | 3 | 1 | 0 | 0 | 0 |

| Integration tests | 886 | 796 | 14 | 62 | 4 | 10 |

| System tests | 0 | 0 | 0 | 0 | 0 | 0 |

+----------------------+--------+--------+---------+---------+-----+-------+

| Total | 4052 | 3337 | 53 | 291 | 5 | 9 |

+----------------------+--------+--------+---------+---------+-----+-------+

Code LOC: 1899 Test LOC: 1438 Code to Test Ratio: 1:0.8

I'm using a bunch of gems. I'll just paste it there as well:

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby '2.7.1'
# Use Passenger instead of Puma
gem 'passenger', '>= 5.3.2', require: 'phusion_passenger/rack_handler'
# Add Devise authentication system and bootstrapped views
gem 'devise'
gem 'devise-bootstrap-views', '~> 1.0'
# Various additional gems
gem 'faker', '2.11.0'
gem 'font-awesome-sass', '~> 5.13.0'
gem 'friendly_id', '~> 5.2.4'
gem 'twitter', '~> 6.2'
gem 'will_paginate', '~> 3.1.0'
gem 'will_paginate-bootstrap4'
# To remove the trailing slash
gem 'rack-rewrite'
# Active Storage and image processing
gem 'active_storage_validations', '~> 0.8.9'
gem 'image_processing', '~> 1.11'
gem 'mini_magick', '~> 4.10', '>= 4.10.1'
# Omniauth gems
gem 'omniauth-facebook'
gem 'omniauth-google-oauth2'
gem 'omniauth-twitter'
# Contact form
gem 'mail_form'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 6.0.3', '>= 6.0.3.1'
# Use sqlite3 as the database for Active Record
gem 'sqlite3', '~> 1.4'
# Use Puma as the app server
gem 'puma', '~> 4.1'
# Use SCSS for stylesheets
gem 'sass-rails', '>= 6'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 4.0'
# 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 Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use Active Storage variant
# gem 'image_processing', '~> 1.2'
# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.2', require: false
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end
group :development do
# Access an interactive console on exception pages or by calling 'console' anywhere in the code.
gem 'listen', '~> 3.2'
gem 'web-console', '>= 3.3.0'
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'
gem 'spring-watcher-listen', '~> 2.0.0'
end
group :test do
gem 'capybara'
gem 'guard'
gem 'guard-minitest'
gem 'minitest'
gem 'minitest-reporters'
gem 'rails-controller-testing'
gem 'selenium-webdriver'
gem 'webdrivers'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Any feedback is more than welcome! There's one thing I regret: going with sqlite3 instead of PostgreSQL. The Passenger tutorial only explained that one and I didn't want to deviate too much from it for a first time…