Posts

Introduction Cross-Origin Resource Sharing (CORS) is one of the most misunderstood parts of modern web development. It sits at the intersection of browsers, HTTP, and security, and when it goes wrong you often see opaque errors like “CORS policy: No ‘Access-Control-Allow-Origin’ header…”. This guide takes you from zero to hero: you’ll learn the mental model behind CORS, how the browser enforces it, how to configure servers correctly across popular stacks, how to optimize performance, and how to avoid common security pitfalls. ...

Introduction Expo Go is a cornerstone tool in the React Native ecosystem, enabling developers to build, test, and iterate on mobile apps rapidly without the overhead of compiling native code for every change. This tutorial dives deeply into how Expo Go works internally, revealing the architecture, workflows, and limitations that make it such a unique and powerful tool for mobile app development. By understanding Expo Go’s inner workings, you will better leverage its capabilities, troubleshoot issues, and know when to transition to custom development builds. ...

Nginx is one of the most popular open-source web servers in the world, widely used not only to serve static content but also as a reverse proxy, load balancer, and HTTP cache. This comprehensive tutorial will guide you step-by-step from the basics of installing Nginx to configuring advanced features, helping you become proficient in managing and optimizing it for your projects. Table of Contents Introduction to Nginx Installing Nginx Understanding Nginx Architecture Basic Configuration and Serving Static Content Configuring Reverse Proxy and Load Balancing Optimizing Nginx Performance Setting Up HTTPS with SSL/TLS Advanced Configurations and Use Cases Useful Commands for Managing Nginx Further Resources Conclusion Introduction to Nginx Nginx (pronounced “Engine-X”) is a high-performance web server designed to handle many concurrent connections efficiently. Unlike traditional web servers, it uses an event-driven, asynchronous architecture, which makes it well suited for high-traffic websites and applications. ...

Introduction Building a SaaS today means delivering a seamless experience across platforms, iterating quickly, and instrumenting everything from auth to analytics. Expo—on top of React Native—gives you a modern toolchain to ship high-quality mobile (and web) apps faster, with over-the-air updates, a file-based router, first-class TypeScript, deep integrations, and a sane path to the App Store and Google Play. In this guide, you’ll go from zero to hero building a production-ready SaaS with Expo. We’ll cover architecture, auth, multi-tenancy, payments (Stripe and RevenueCat), deep linking, push notifications, OTA updates with EAS, testing, security, analytics, and CI/CD. You’ll get practical code snippets and a curated resources section for deeper research. ...

Building a SaaS used to require weeks of backend setup before you could even validate your idea. Firebase changes that. With Auth, a real-time database, serverless functions, hosting, analytics, and a rich extension marketplace (including Stripe subscriptions), you can ship a production-grade MVP in days—not months. This comprehensive guide shows you how to plan, build, and scale a multi-tenant SaaS on Firebase. You’ll get architecture advice, security best practices, code snippets, a step-by-step tutorial, and a final resources chapter to keep going. ...