Building a Guest Book on the Edge with SvelteKit, Upstash Redis® and Vercel

The blog post provides a comprehensive guide on building and deploying a site using SvelteKit and Vercel's Edge Functions, which allows for dynamic page rendering at CDN-like speeds. It explains how to create a site that displays a list of cities from which users have visited, utilizing Vercel's edge headers to detect a user's city and country based on their IP address. The tutorial also demonstrates how to store and manage this data in a Redis database using Upstash, highlighting the setup of environment variables and Redis functions for storing and retrieving city data. Additionally, it covers deploying the application to Vercel, using the Vercel adapter in SvelteKit to enable edge functionality, and emphasizes the simplicity and efficiency of serverless deployment for global distribution. The tutorial is supplemented by code snippets, a live demo, and references to SvelteKit's documentation for further exploration of its features and capabilities.