Add Location header clone for Alamofire + devise_token_auth password reset flow

passwords_controller.rb

class Auth::PasswordsController < DeviseTokenAuth::PasswordsController
  def edit
    super
    # Alamofire tends to ignore Location header in .allHeaderFields, blindly following its contents instead
    # so we add a new header with the same value
    # in order to parse it in mobile app
    response.headers['Alamofire-Location'] = response.headers['Location']
  end
end

routes.rb

mount_devise_token_auth_for 'User', at: 'auth', controllers: {
  passwords: 'auth/passwords',
}