infra-docker-containerization

To build secure Docker images, use multi-stage builds to isolate dependencies, configure non-root runtime users, and select minimal base images to reduce the attack surface. This approach ensures reproducible container packaging and predictable deployment behavior.

Configuring a non-root runtime user in a Dockerfile involves creating a dedicated user and switching to it before the container starts. This hardens image security by preventing privileged execution and limiting potential attack vectors during runtime.

Validating Docker image compliance requires running explicit validation commands and checks after building the image. This process verifies image integrity, ensures policy compliance, and confirms that the hardened container meets security standards.

Yes, you can use existing Dockerfiles by applying the containerization workflow to build secure images. It leverages your current configurations while adding multi-stage builds, .dockerignore rules, and validation steps to ensure reproducible results.

Your Docker image may have a large attack surface due to using heavy base images, running processes as root, or including unnecessary build dependencies. Applying multi-stage builds and minimal base images significantly reduces these vulnerabilities.