Update db seeds

Author: rossta

db/seeds/development.rb

@@ -7,11 +7,15 @@
 end
 
 User.find_or_create_by(
-  email: "[email protected]"
+  email: Rails.configuration.settings.emails.test_recipient
 ) do |u|
   u.password = "password"
   u.password_confirmation = "password"
   u.confirmed_at = Time.zone.now
 end
 
 ColorScheme.find_or_create_default
+
+START_COUNT_NEWSLETTERS = 5
+fill_count = START_COUNT_NEWSLETTERS - Newsletter.count
+FactoryBot.create_list(:newsletter, fill_count) if fill_count > 0