Phase 7Advanced8 of 11 in Docker

Optimization & Security

Making images smaller, builds faster, and containers genuinely harder to break out of.

A container that 'works' and a container that's actually production-ready are different bars. This phase covers the size, speed, and security habits that close that gap.

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2 topics ~27 min 3 code blocks & diagrams

Start with the first topic

7.1

Shrinking Your Images

A smaller image pulls faster, deploys faster, costs less to store, and has fewer places for a vulnerability to hide — size reduction is one of the highest-leverage things you can do to a Dockerfile.

13 min 1 code practice

7.2

Container Security Fundamentals

A container's isolation is strong but not absolute — a handful of concrete habits close the most common, most exploited gaps.

14 min 1 diagram 1 code practice

Command Palette

Shrinking Your Images

Container Security Fundamentals