Attachments not showing on mailcatcher 0.8.1

[Allen Chun]

I'm currently using Ruby 2.6.0 and mailcatcher 0.8.1

I have csv inside my public/attachments/L0052.csv which is only 903 bytes

 def send_transactions(hotel_code)
    @hotel_code = hotel_code

    attachments['L0052.csv'] = File.read('public/attachments/L0052.csv')

    mail(to: @hotel_code.email, subject: "Quarterly Report")
  end

I managed to receive the email from mailcatcher but there's no attached file

This is the content of the source