How I Vibe Coded a Full App using Claude Code (with Database, Payment, Login)

A beginner-friendly walkthrough of building a full stock investment web app called Market Cap using Claude Code, without writing any code manually. Covers the entire workflow: planning with Claude's plan mode, building a frontend dashboard using a design reference, connecting a live stock pricing API (Finnhub), setting up user authentication and a database with Supabase, integrating Stripe for subscription payments, pushing code to GitHub, and deploying to Hostinger. Key concepts like context windows, MCP connectors, environment variables, and localhost are explained in plain English throughout.