Add mailer for sending reminding's notifications
user
```ruby
class ProjectNotificationMailer < ApplicationMailer
  attr_reader :project_check

  def check_reminder(notification, project_check)
    @project_check = project_check
    mail(to: compose_email,
         subject: compose_subject) do |format|
      format.text { render inline: notification }
    end
  end

  private

  def compose_subject
    "Reminders: next #{project_check.reminder.name}
    in #{project_check.project.name}"
  end

  def compose_email
    "#{slugified_project_name}-team@netguru.pl"
  end

  def slugified_project_name
    project_check.project.name.sub(" ", "-")
  end
end
```
assistant