Java CI/CD: From JAR to Docker

Matthew Casperson's blog post explores the process of containerizing a Java application, specifically the Spring PetClinic, using Docker to create a self-contained, repeatable build and execution environment. The post details how to clone the PetClinic repository, build the application locally using Maven, and transition it into a Docker image with a multistage Dockerfile to ensure efficient and consistent builds. By utilizing Docker, the application can be easily shared and run on any system with Docker installed, providing a consistent setup regardless of the local environment. The PetClinic Docker image is also uploaded to a Docker registry, making it publicly accessible. The post concludes by emphasizing the importance of Continuous Integration (CI) for maintaining codebase health as more developers contribute to the project, hinting at future integration with Jenkins for automated builds.