Chore: Added tests for contacts_controller (#509)

- Tests for contacts controller
Addresses:  #37

spec/factories/contacts.rb

@@ -5,6 +5,7 @@ FactoryBot.define do
     sequence(:name) { |n| "Widget #{n}" }
     sequence(:email) { |n| "widget-#{n}@example.com" }
     phone_number { '+123456789011' }
+    avatar { fixture_file_upload(Rails.root.join('spec/assets/avatar.png'), 'image/png') }
     account
   end
 end