diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..a5f2335
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,42 @@
+AllCops:
+  TargetRubyVersion: 4.0
+  NewCops: enable
+  UseProjectIndex: true
+  ProjectIndexIncludesGems: true
+  Exclude:
+    - "bin/*"
+
+# Standard rules. Style:
+
+# Enforced by `standard`. Disable.
+Style/StringLiterals:
+  Enabled: false
+
+# Standard rules. Layout:
+
+# Enforced by `standard`. Disable.
+Layout/SpaceInsideHashLiteralBraces:
+  Enabled: false
+
+# Our `rubocop` rules
+
+# Bundler rules.
+
+Bundler/OrderedGems:
+  Enabled: false
+
+# Style rules
+
+# Don't allow %i[foo bar baz]
+Style/SymbolArray:
+  Enabled: true
+  EnforcedStyle: brackets
+
+# Don't allow %w[foo bar baz]
+Style/WordArray:
+  Enabled: true
+  EnforcedStyle: brackets
+
+# Disable warnings like "Missing top-level documentation comment for"
+Style/Documentation:
+  Enabled: false
diff --git a/.standard.yml b/.standard.yml
new file mode 100644
index 0000000..323fdc2
--- /dev/null
+++ b/.standard.yml
@@ -0,0 +1 @@
+ruby_version: 4.0
diff --git a/Gemfile b/Gemfile
index 94a15ea..c6a2aa8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source "https://rubygems.org"
 
 # Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
@@ -8,7 +10,7 @@ gem "propshaft"
 gem "puma", ">= 5.0"
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-gem "tzinfo-data", platforms: %i[ windows jruby ]
+gem "tzinfo-data", platforms: [:windows, :jruby]
 
 group :development, :test do
   gem "rubydex", require: false
diff --git a/Rakefile b/Rakefile
index 9a5ea73..d2a78aa 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 09705d1..7944f9f 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 class ApplicationController < ActionController::Base
 end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index de6be79..15b06f0 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 module ApplicationHelper
 end
diff --git a/bin/rdx b/bin/rdx
new file mode 100755
index 0000000..0b947be
--- /dev/null
+++ b/bin/rdx
@@ -0,0 +1,16 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'rdx' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("rubydex", "rdx")
diff --git a/bin/rubocop b/bin/rubocop
new file mode 100755
index 0000000..d73598d
--- /dev/null
+++ b/bin/rubocop
@@ -0,0 +1,16 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'rubocop' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("rubocop", "rubocop")
diff --git a/bin/standardrb b/bin/standardrb
new file mode 100755
index 0000000..3b77a15
--- /dev/null
+++ b/bin/standardrb
@@ -0,0 +1,16 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'standardrb' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("standard", "standardrb")
diff --git a/config.ru b/config.ru
index 4a3c09a..2e03084 100644
--- a/config.ru
+++ b/config.ru
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file is used by Rack-based servers to start the application.
 
 require_relative "config/environment"
diff --git a/config/application.rb b/config/application.rb
index ae56e4d..26c921b 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative "boot"
 
 require "rails"
@@ -26,7 +28,7 @@ class Application < Rails::Application
     # Please, add to the `ignore` list any other `lib` subdirectories that do
     # not contain `.rb` files, or that should not be reloaded or eager loaded.
     # Common ones are `templates`, `generators`, or `middleware`, for example.
-    config.autoload_lib(ignore: %w[assets tasks])
+    config.autoload_lib(ignore: ["assets", "tasks"])
 
     # Configuration for the application, engines, and railties goes here.
     #
diff --git a/config/boot.rb b/config/boot.rb
index 2820116..c2241d7 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
 
 require "bundler/setup" # Set up gems listed in the Gemfile.
diff --git a/config/ci.rb b/config/ci.rb
index 6add09b..5125ce3 100644
--- a/config/ci.rb
+++ b/config/ci.rb
@@ -1,10 +1,10 @@
+# frozen_string_literal: true
+
 # Run using bin/ci
 
 CI.run do
   step "Setup", "bin/setup --skip-server"
 
-
-
   # Optional: set a green GitHub commit status to unblock PR merge.
   # Requires the `gh` CLI and `gh extension install basecamp/gh-signoff`.
   # if success?
diff --git a/config/environment.rb b/config/environment.rb
index cac5315..7df99e8 100644
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Load the Rails application.
 require_relative "application"
 
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 6f8ff95..58336f2 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/core_ext/integer/time"
 
 Rails.application.configure do
@@ -20,7 +22,7 @@
   if Rails.root.join("tmp/caching-dev.txt").exist?
     config.action_controller.perform_caching = true
     config.action_controller.enable_fragment_cache_logging = true
-    config.public_file_server.headers = { "cache-control" => "public, max-age=#{2.days.to_i}" }
+    config.public_file_server.headers = {"cache-control" => "public, max-age=#{2.days.to_i}"}
   else
     config.action_controller.perform_caching = false
   end
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 20c025c..2239ed3 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/core_ext/integer/time"
 
 Rails.application.configure do
@@ -16,7 +18,7 @@
   config.action_controller.perform_caching = true
 
   # Cache assets for far-future expiry since they are all digest stamped.
-  config.public_file_server.headers = { "cache-control" => "public, max-age=#{1.year.to_i}" }
+  config.public_file_server.headers = {"cache-control" => "public, max-age=#{1.year.to_i}"}
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.asset_host = "http://assets.example.com"
@@ -31,8 +33,8 @@
   # config.ssl_options = { redirect: { exclude: ->(request) { request.path == "/up" } } }
 
   # Log to STDOUT with the current request id as a default log tag.
-  config.log_tags = [ :request_id ]
-  config.logger   = ActiveSupport::TaggedLogging.logger(STDOUT)
+  config.log_tags = [:request_id]
+  config.logger = ActiveSupport::TaggedLogging.logger(STDOUT)
 
   # Change to "debug" to log everything (including potentially personally-identifiable information!).
   config.log_level = ENV.fetch("RAILS_LOG_LEVEL", "info")
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 14bc29e..0e151ba 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # The test environment is used exclusively to run your application's
 # test suite. You never need to work with it otherwise. Remember that
 # your test database is "scratch space" for the test suite and is wiped
@@ -16,7 +18,7 @@
   config.eager_load = ENV["CI"].present?
 
   # Configure public file server for tests with cache-control for performance.
-  config.public_file_server.headers = { "cache-control" => "public, max-age=3600" }
+  config.public_file_server.headers = {"cache-control" => "public, max-age=3600"}
 
   # Show full error reports.
   config.consider_all_requests_local = true
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index 4873244..8544c07 100644
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
diff --git a/config/initializers/content_security_policy.rb b/config/initializers/content_security_policy.rb
index d51d713..74b18c5 100644
--- a/config/initializers/content_security_policy.rb
+++ b/config/initializers/content_security_policy.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Define an application-wide content security policy.
diff --git a/config/initializers/filter_parameter_logging.rb b/config/initializers/filter_parameter_logging.rb
index c0b717f..497ac13 100644
--- a/config/initializers/filter_parameter_logging.rb
+++ b/config/initializers/filter_parameter_logging.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Configure parameters to be partially matched (e.g. passw matches password) and filtered from the log file.
diff --git a/config/initializers/inflections.rb b/config/initializers/inflections.rb
index 3860f65..9e049dc 100644
--- a/config/initializers/inflections.rb
+++ b/config/initializers/inflections.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Add new inflection rules using the following format. Inflections
diff --git a/config/initializers/perron.rb b/config/initializers/perron.rb
index 30d29d5..e619b27 100644
--- a/config/initializers/perron.rb
+++ b/config/initializers/perron.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Perron.configure do |config|
   # For all options check out:
   # https://perron.railsdesigner.com/docs/configuration/
diff --git a/config/puma.rb b/config/puma.rb
index 1c317b4..4c27d35 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This configuration file will be evaluated by Puma. The top-level methods that
 # are invoked here are part of Puma's configuration DSL. For more information
 # about methods provided by the DSL, see https://puma.io/puma/Puma/DSL.html.
diff --git a/config/routes.rb b/config/routes.rb
index 48254e8..18bbdcf 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.routes.draw do
   # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html