diff --git a/bin/setup b/bin/setup
index 57b65c85d..cf2acd188 100755
--- a/bin/setup
+++ b/bin/setup
@@ -5,7 +5,7 @@ require "fileutils"
 APP_ROOT = File.expand_path("..", __dir__)
 
 def system!(*args)
-  system(*args) || abort("\n== Command #{args} failed ==")
+  system(*args, exception: true)
 end
 
 FileUtils.chdir APP_ROOT do
diff --git a/config/application.rb b/config/application.rb
index 820436ed3..2f868c663 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -22,7 +22,7 @@
 module Static
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 7.0
+    config.load_defaults 7.1
 
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration can go into files in config/initializers
diff --git a/config/boot.rb b/config/boot.rb
index 997563c2a..988a5ddc4 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -1,4 +1,4 @@
 ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
 
 require "bundler/setup" # Set up gems listed in the Gemfile.
-require "bootsnap/setup"
+require "bootsnap/setup" # Speed up boot time by caching expensive operations.
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 5154ed9e7..27f2c4971 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -6,7 +6,7 @@
   # In the development environment your application's code is reloaded any time
   # it changes. This slows down response time but is perfect for development
   # since you don't have to restart the web server when you make code changes.
-  config.cache_classes = false
+  config.enable_reloading = true
 
   # Do not eager load code on boot.
   config.eager_load = false
@@ -56,4 +56,7 @@
 
   # Uncomment if you wish to allow Action Cable access from any origin.
   # config.action_cable.disable_request_forgery_protection = true
+
+  # Raise error when a before_action's only/except options reference missing actions
+  config.action_controller.raise_on_missing_callback_actions = true
 end
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 05a4df211..7eaac7044 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -4,7 +4,7 @@
   # Settings specified here will take precedence over those in config/application.rb.
 
   # Code is not reloaded between requests.
-  config.cache_classes = true
+  config.enable_reloading = false
 
   # Eager load code on boot. This eager loads most of Rails and
   # your application in memory, allowing both threaded web servers
@@ -40,6 +40,10 @@
   # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for Apache
   # config.action_dispatch.x_sendfile_header = "X-Accel-Redirect" # for NGINX
 
+  # Assume all access to the app is happening through a SSL-terminating reverse proxy.
+  # Can be used together with config.force_ssl for Strict-Transport-Security and secure cookies.
+  # config.assume_ssl = true
+
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true
 
@@ -83,4 +87,12 @@
   if ENV["HEROKU_APP_NAME"] && !ENV.include?("PLEK_SERVICE_STATIC_URI")
     ENV["PLEK_SERVICE_STATIC_URI"] = "#{ENV['HEROKU_APP_NAME']}.herokuapp.com"
   end
+
+  # Enable DNS rebinding protection and other `Host` header attacks.
+  # config.hosts = [
+  #   "example.com",     # Allow requests from example.com
+  #   /.*\.example\.com/ # Allow requests from subdomains like `www.example.com`
+  # ]
+  # Skip DNS rebinding protection for the default health check endpoint.
+  # config.host_authorization = { exclude: ->(request) { request.path == "/up" } }
 end
diff --git a/config/environments/test.rb b/config/environments/test.rb
index e9dad81d4..2eecacae8 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -11,9 +11,10 @@
   # Turn false under Spring and add config.action_view.cache_template_loading = true.
   config.cache_classes = true
 
-  # Eager loading loads your whole application. When running a single test locally,
-  # this probably isn't necessary. It's a good idea to do in a continuous integration
-  # system, or in some way before deploying your code.
+  # Eager loading loads your entire application. When running a single test locally,
+  # this is usually not necessary, and can slow down your test suite. However, it's
+  # recommended that you enable it in continuous integration systems to ensure eager
+  # loading is working properly before deploying your code.
   config.eager_load = ENV["CI"].present?
 
   # Configure public file server for tests with Cache-Control for performance.
@@ -50,4 +51,7 @@
 
   # Annotate rendered view with file names.
   # config.action_view.annotate_rendered_view_with_filenames = true
+
+  # Raise error when a before_action's only/except options reference missing actions
+  config.action_controller.raise_on_missing_callback_actions = true
 end
diff --git a/config/initializers/content_security_policy.rb b/config/initializers/content_security_policy.rb
index 54f47cf15..b3076b38f 100644
--- a/config/initializers/content_security_policy.rb
+++ b/config/initializers/content_security_policy.rb
@@ -16,9 +16,9 @@
 #     # policy.report_uri "/csp-violation-report-endpoint"
 #   end
 #
-#   # Generate session nonces for permitted importmap and inline scripts
+#   # Generate session nonces for permitted importmap, inline scripts, and inline styles.
 #   config.content_security_policy_nonce_generator = ->(request) { request.session.id.to_s }
-#   config.content_security_policy_nonce_directives = %w(script-src)
+#   config.content_security_policy_nonce_directives = %w(script-src style-src)
 #
 #   # Report violations without enforcing the policy.
 #   # config.content_security_policy_report_only = true
diff --git a/config/initializers/permissions_policy.rb b/config/initializers/permissions_policy.rb
index 00f64d71b..7db3b9577 100644
--- a/config/initializers/permissions_policy.rb
+++ b/config/initializers/permissions_policy.rb
@@ -1,11 +1,13 @@
+# Be sure to restart your server when you modify this file.
+
 # Define an application-wide HTTP permissions policy. For further
-# information see https://developers.google.com/web/updates/2018/06/feature-policy
-#
-# Rails.application.config.permissions_policy do |f|
-#   f.camera      :none
-#   f.gyroscope   :none
-#   f.microphone  :none
-#   f.usb         :none
-#   f.fullscreen  :self
-#   f.payment     :self, "https://secure.example.com"
+# information see: https://developers.google.com/web/updates/2018/06/feature-policy
+
+# Rails.application.config.permissions_policy do |policy|
+#   policy.camera      :none
+#   policy.gyroscope   :none
+#   policy.microphone  :none
+#   policy.usb         :none
+#   policy.fullscreen  :self
+#   policy.payment     :self, "https://secure.example.com"
 # end