Tech Ocean

Apr 19, 2026 · Cloud Native

Docker Day 5: Multi‑Stage Builds and Build Caching for Smaller, Faster Images

This article shows how to shrink Docker images and speed up builds by using multi‑stage builds, ordering instructions for layer caching, fine‑tuning .dockerignore, merging RUN commands, picking lightweight base images, and running containers as a non‑root user, with concrete code examples and build‑time measurements.