Dockerizing an Application

In this chapter, we will learn about Docker and how to package applications as Docker images. Understanding how to package your application as a Docker image will allow you to deploy the application in any kind of environment and infrastructure without having to worry about setting up the infrastructure to build your application. Building a Docker image will allow you to run your application anywhere you like: build once and deploy anywhere.

In this chapter, we will learn about the following key topics:

• Building a Docker image
• Running a Docker image
• Creating a Docker image from scratch
• Understanding the Docker image filesystem
• Looking at Docker Compose