From https://once.com/writebook

Gemfile

@@ -0,0 +1,49 @@
+source "https://rubygems.org"
+
+ruby file: ".ruby-version"
+
+gem "rails", github: "rails/rails"
+
+# Drivers
+gem "sqlite3", "~> 1.4"
+gem "redis", ">= 4.0.1"
+
+# Deployment
+gem "puma", ">= 5.0"
+
+# Jobs
+gem "resque", "~> 2.6.0"
+gem "resque-pool", "~> 0.7.1"
+
+# Front-end
+gem "propshaft"
+gem "importmap-rails"
+gem "turbo-rails"
+gem "stimulus-rails"
+
+# Other
+gem "jbuilder"
+gem "redcarpet", "~> 3.6"
+gem "rouge", "~> 4.2"
+gem "bcrypt", "~> 3.1.7"
+gem "image_processing", "~> 1.2"
+gem "rqrcode"
+gem "thruster"
+gem "useragent", github: "basecamp/useragent"
+gem "front_matter_parser"
+
+group :development, :test do
+  gem "debug"
+  gem "faker", require: false
+  gem "brakeman", require: false
+  gem "rubocop-rails-omakase", require: false
+end
+
+group :development do
+  gem "web-console"
+end
+
+group :test do
+  gem "capybara"
+  gem "selenium-webdriver"
+end