The following is an explanation of each line in the Dockerfile. Containers, images and the Dockerfile. The Dockerfile, as shown above in Figure 1, declares node:15.4.0-alpine3.10 as the base image..

How docker-compose works. Unlike the Dockerfile, the docker-compose command and the docker-compose.yaml file the command depends upon are not used to actually build Docker images. Instead, ...

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 ...

Podman vs. Docker. The other big name from the world of containers that you’ve almost certainly heard is Docker.Docker wasn’t the first container engine but in many ways it has come to define ...

Docker can build images automatically by reading the instructions from a Dockerfile. A typical Dockerfile contains the following instructions: 1. FROM - It will set the base image of the container.

Containers are defined by an image, which is like a recipe for a container. ... That is exactly the difference between Docker and a VM. A VM provides a different surface, ...

A container isn't much use if you can't easily share or manage its data. Here's how to handle this task with the help of Docker volumes.