Multi-Stage Builds & Smaller Images
Learn how multi-stage Dockerfiles let you ship lean production images by separating build tools from the final runtime, dramatically reducing image size.
Why Image Size Matters
Large images are slow to build, push, and pull, and they carry a bigger attack surface. A good engineering goal is to ship the smallest image that still runs your app.
The Bloat Problem
Building an app often needs compilers, dev dependencies, and build tools. If those end up in the final image, it balloons in size — even though the running app does not need any of them.
All lessons in this course
- Understanding Dockerfiles
- Creating Custom Docker Images
- Image Layers and Optimization
- Multi-Stage Builds & Smaller Images