The docker-compose.yml file is broken into sections, each section represents a single container which, when combined with the other containers, create the service.

The build context is the set of files located at the specified PATH or URL. Those files are sent to the Docker daemon during the build so it can use them in the filesystem of the image.

We’re going to create a Dockerfile to build an image based on the latest version of Ubuntu, which includes NGINX. Create a new directory to house the Dockerfile with: mkdir docker_images ...

Docker image. Similar to a snapshot in the VM world, a Docker image is a portable, read-only, executable file containing the instructions for creating a container and the specifications for which ...