adhere to rubocop guidelines

config/environments/development.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
@@ -18,7 +20,7 @@ Rails.application.configure do
 
     config.cache_store = :memory_store
     config.public_file_server.headers = {
-      'Cache-Control' => 'public, max-age=172800'
+      'Cache-Control' => 'public, max-age=172800',
     }
   else
     config.action_controller.perform_caching = false

config/environments/production.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
@@ -47,7 +49,7 @@ Rails.application.configure do
   config.log_level = :debug
 
   # Prepend all log lines with the following tags.
-  config.log_tags = [ :request_id ]
+  config.log_tags = [:request_id]
 
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
@@ -85,9 +87,6 @@ Rails.application.configure do
   config.active_record.dump_schema_after_migration = false
 
   # Set the relative url root for deployment to a subdirectory.
-  if ENV['RELATIVE_URL_ROOT'].present?
-    config.relative_url_root = ENV['RELATIVE_URL_ROOT']
-  else
-    config.relative_url_root = "/"
-  end
+  config.relative_url_root = "/"
+  config.relative_url_root = ENV['RELATIVE_URL_ROOT'] if ENV['RELATIVE_URL_ROOT'].present?
 end

config/environments/test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
@@ -15,7 +17,7 @@ Rails.application.configure do
   # Configure public file server for tests with Cache-Control for performance.
   config.public_file_server.enabled = true
   config.public_file_server.headers = {
-    'Cache-Control' => 'public, max-age=3600'
+    'Cache-Control' => 'public, max-age=3600',
   }
 
   # Show full error reports and disable caching.