📄️ Docker Image Optimization for Spring Boot
Docker images for Spring Boot applications often start bloated—large downloads, slow CI/CD pipelines, and unnecessary attack surface. This guide shows you how to dramatically reduce image size while improving security and build speed.
📄️ JRE Base Images on Alpine Linux
The default openjdk images are often built on top of full-sized Linux distributions (like Debian or Ubuntu) and include the full Java Development Kit (JDK).
📄️ Multi-Stage Builds
In the "old days," you'd run mvn package on your laptop or a Jenkins server and then docker build to copy the resulting JAR. This is messy and inconsistent.
📄️ Layered JARs and Caching
This is where the magic happens for developer productivity. Docker works on a Layered File System. If a layer hasn't changed, Docker reuses the cached version.