instruction: Explain Docker containerization and best practices
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  The following sections provide step-by-step guides to help you understand core Docker concepts, building images, and running containers.
  The basics
  Get started learning the core concepts of containers, images, registries, and Docker Compose.
  What is a container?
  Learn how to run your first container.
  What is an image?
  Learn the basics of image layers.
  What is a registry?
  Learn about container registries, explore their interoperability, and interact with registries.
  What is Docker Compose?
  Gain a better understanding of Docker Compose.
  Building images
  Craft optimized container images with Dockerfiles, build cache, and multi-stage builds.
  Understanding image layers
  Learn about the layers of container images.
  Writing a Dockerfile
  Learn how to create an image using a Dockerfile.
  Build, tag and publish an image
  Learn how to build, tag, and publish an image to Docker Hub or any other registry.
  Using the build cache
  Learn about the build cache, what changes invalidate the cache, and how to effectively use the build cache.
  Multi-stage builds
  Get a better understanding of multi-stage builds and their benefits.
  Running containers
  Master essential techniques for exposing ports, overriding defaults, persisting data, sharing files, and managing multi-container applications.
  Publishing ports
  Understand the significance of publishing and exposing ports in Docker.
  Overriding container defaults
  Learn how to override the container defaults using the
  docker run
  command.
  Persisting container data
  Learn the significance of data persistence in Docker.
  Sharing local files with containers
  Explore the various storage options available in Docker and their common usage.
  Multi-container applications
  Learn the significance of multi-container applications and how they're different from single-container applications.