Learn how to turn your tweets into physical printouts on a label maker via the Cups/PPD API. It's a silly concept, but can have some great real world application with interfacing with printers.
A brief introduction on Rails API. Learn how to create an API application and setup the routes. This episode is paving the way for more in depth looks into Rails API.
Learn to use custom error pages to provide a similar look to your application. Get notified on Slack as errors occur to act on them before they're reported.