Introduction To Docker

Docker is an open-source platform that simplifies the process of developing, shipping, and running applications. By using Docker, you can package your application and all its dependencies into a standardized unit called a container. This ensures that your application works consistently across different environments.

What is Docker?

Docker is essentially a tool that allows you to create, deploy, and run applications using containers. Containers bundle an application with all its dependencies, including libraries and configuration files, and can run on any system with Docker installed.

Key Concepts

Containers:

Lightweight, portable, and self-sufficient units that contain everything needed to run an application.
Share the host system’s OS kernel but are isolated from other containers.

Docker Engine:

The core component of Docker, responsible for creating and running containers. It includes a server, a REST API, and a command-line interface (CLI).

Images:

Read-only templates used to create containers. They are built from a Dockerfile and can be stored in repositories like Docker Hub.
Dockerfile: