Multi Stage Dockerfile

Multi-stage Dockerfiles help you build smaller and more secure container images. You use one stage to compile code and install dependencies. Then you use a second stage that only holds the final application files. This removes unnecessary tools and files. The result is a lightweight image that is safer to run. Anyone building containers for any programming language can benefit from this approach.

With multi-stage builds you follow a clear structure. You start with a builder stage for heavy work. Then you copy only the needed artifacts to a runtime stage. This keeps your final image clean. You also use minimal base images like Alpine or distroless versions. This further reduces size and attack surface.

Best practices include ordering commands for better caching and avoiding running as root. You also use build arguments and healthchecks. This skill guides you through all these steps to create professional Dockerfiles that are efficient and secure.