Docker

Docker as engineers actually use it — layer caching, multi-stage builds, image hygiene, networking modes, and how to keep your images small without resorting to alpine cargo-culting.

2 articles · updated regularly

Docker

Feb 18, 202610 min

Multi-Stage Builds: How I Cut a 1.2 GB Image Down to 80 MB Without Skipping Anything

Multi-stage is the single biggest practical lever in Docker. A walk through a real Spring Boot + Node front-end image, the cuts I made, and why one of them was a mistake.

DockerBuild

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Docker

Feb 04, 20269 min

Docker Layers, the COW Filesystem, and Why Your Dockerfile Order Quietly Decides Your Build Time

Every Dockerfile line is a layer; every layer is a decision. Here's what's actually happening on disk — and why moving COPY around can take your build from 2 minutes to 12 seconds.

DockerBuild

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Multi-Stage Builds: How I Cut a 1.2 GB Image Down to 80 MB Without Skipping Anything

Docker Layers, the COW Filesystem, and Why Your Dockerfile Order Quietly Decides Your Build Time

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