02. Setting up Slim

03. Designing the form

04. Submitting the form

05. Setting up the database and model

06. Storing a message

07. Using UUIDs instead of IDs

08. Viewing a self destructing message

09. Destroying a message

10. Flashing messages

11. Setting up SwiftMailer

12. Sending the email

13. Refactoring to use a command bus

14. Setting configuration in an environment file