feat: customized page 404

config/application.rb

@@ -104,6 +104,8 @@ module TPS
     config.active_record.encryption.primary_key = Rails.application.secrets.active_record_encryption.fetch(:primary_key)
     config.active_record.encryption.key_derivation_salt = Rails.application.secrets.active_record_encryption.fetch(:key_derivation_salt)
 
+    config.exceptions_app = self.routes
+
     # Copied from rgeo/activerecord-postgis-adapter
     ActiveRecord::SchemaDumper.ignore_tables |= [
       'geography_columns',

config/routes.rb

@@ -698,6 +698,8 @@ Rails.application.routes.draw do
 
   resources :release_notes, only: [:index]
 
+  get '/404', to: 'errors#not_found'
+
   if Rails.env.test?
     scope 'test/api_geo' do
       get 'regions' => 'api_geo_test#regions'