Docker Engine and Dockerfile Basics

• Docker is a software that helps developers build, deploy, and run applications more efficiently.
• Docker images are lightweight executable packages that include everything needed to run an application, including code, libraries, and environment variables.
• A Dockerfile is a document that contains all the commands a user wants to call on the command line to build an image.
• To be able to run the Docker Engine, you will need to have a supported version of CentOS installed.
• To install the engine, you will first set up a repository and then use the repository to install the engine.
• The engine can be used to pull and run images, as well as run containers.

Test your knowledge of Docker, including its use for building and running applications, working with Docker images and Dockerfiles, as well as setting up and using the Docker Engine.