Docker is a platform that enables you to build, ship, and run applications. It provides a lightweight and portable environment for your applications to run consistently across different environments.

Key Concepts

Here are some key concepts in Docker:

  • Containers: Containers are lightweight, isolated environments that package an application with all its dependencies. They run consistently across different environments.
  • Images: Docker images are templates that define the application's environment. You can create images from scratch or use base images provided by Docker Hub.
  • Dockerfile: A Dockerfile is a text file that contains instructions to build a Docker image.
  • Registry: A registry is a storage service for Docker images. Docker Hub is a popular public registry, but you can also use private registries.

How to Get Started

To get started with Docker, follow these steps:

  1. Install Docker
  2. Run a container using the docker run command.
  3. Create your own Docker images using a Dockerfile.

Example

Here's an example of a simple Dockerfile:

FROM alpine
RUN echo "Hello, Docker!" > hello
CMD ["/bin/sh", "-c", "cat hello"]

This Dockerfile creates an image that prints "Hello, Docker!" when you run it.

More Resources

For more information on Docker concepts, check out the following resources:

Docker Image