Build, deploy, and manage applications in the cloud with Heroku, one of the first PaaS platforms to offer sophisticated hosting and development services. With this book, you'll learn how to use Heroku's Cedar runtime stack, a polyglot platform with native support for several languages and frameworks, including Ruby (Rails), Java (Spring), Node.js, and Python (Django). Get started with the Heroku Command Line Interface and learn day-to-day best practices for hosting your applications on the platform. You'll learn everything from basic concepts to advanced topics such as Buildpacks so you can start running in the cloud right away. Use pre-baked code examples and instances in Java and Ruby Learn about Heroku's simple application deployment and strong erosion resistance Understand how applications should be built for modern day cloud hosting, using the 12-factor principle