Why I Built This Every Spring Boot project I started, I spent the first 2–3 weeks building the exact same things: JWT authentication Email verification Forgot password flow Google OAuth2 integration Docker setup CI/CD pipeline That is weeks of work before writing a single line of my actual product. So I packaged all of it into SpringLaunch API — a production-ready Spring Boot 4.1.0 boilerplate. Here are the biggest lessons I learned while building it. ...