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Docker Multi-Stage Build Optimization

Learn to create efficient Docker images using multi-stage builds to reduce image size and improve security.

intermediate
local
Docker
60 minutes
5 steps
Prerequisites
  • Basic Docker knowledge
  • Understanding of Dockerfile syntax
Learning Objectives
  • Understand multi-stage build concepts
  • Reduce Docker image size by 70%+
  • Implement security best practices
  • Optimize build caching
Technologies Used
Docker
Node.js
Alpine Linux
Exercise Steps
1

Project Setup

Current

Create a sample Node.js application for containerization.

2

Create Basic Dockerfile

Start with a simple, unoptimized Dockerfile to establish baseline.

3

Implement Multi-Stage Build

Create an optimized Dockerfile using multi-stage builds.

4

Security Analysis

Scan both images for vulnerabilities and compare results.

5

Production-Ready Optimization

Implement advanced optimization techniques including distroless images, build caching, and health checks.

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