The document provides a 5-step process for writing a web app in under 140 characters using Spring Boot, Groovy, and optionally deploying to a cloud provider: 1) Use Spring for dependencies injection and MVC; 2) Use Spring Boot for creating a production-ready service; 3) Use Groovy as the programming language; 4) Run the app using 'spring run app.groovy'; 5) Optionally deploy to a cloud using commands like 'cf push'.