Building a Newsletter App with Upstash Workflow and Redis

The blog post outlines the creation of a newsletter application where users can subscribe to receive newsletters at their preferred frequency, using Upstash Redis and Upstash Workflow to manage data storage and processing. It highlights the advantages of serverless environments and how Upstash Workflow addresses their limitations by allowing persistent workflows without timeouts. The application is built using Next.js and involves setting up environment variables, creating components for subscription and unsubscription forms, and implementing API routes for managing these actions. User subscription data is stored in Redis, and workflows are set up for sending welcome and regular newsletter emails, with features such as automatic retries and real-time monitoring. The workflow API route handles the entire process of scheduling and sending newsletters, ensuring users receive their emails at specified intervals. The project also includes pages for subscribing and unsubscribing, with the complete source code available on GitHub and further information accessible via Upstash's documentation and community resources.