Learn Docker from the ground up - understand containers, images, Dockerfile, volumes, networking, and Docker Compose. This module takes you from zero to confidently building, running, and shipping containerized applications the way it's done in real DevOps and cloud environments.
Docker is a containerization platform that lets you build, run, and ship applications inside lightweight isolated environments called **containers**. It was created in 2013 and has since become the standard tool for packaging software in DevOps, cloud, and backend engineering. Before Docker, deploying an application meant manually installing all its dependencies on every server - and hoping nothing broke between environments. Docker solves this completely.
Understanding Docker's internal architecture helps you debug problems, optimize builds, and design systems correctly.
Master core concepts and production patterns.
An image is a **read-only template** used to create containers. Think of it as a blueprint — the image is the plan, the container is the running building.
A Dockerfile is a plain text file that contains instructions for building a Docker image. Docker reads the file top to bottom and executes each instruction in order.
Multi-stage builds let you use multiple `FROM` statements in one Dockerfile. This lets you build your application in one environment (with all build tools) and then copy only the final binary or output into a clean minimal image.
Docker is a containerization platform that lets you build, run, and ship applications inside lightweight isolated enviro...
Understanding Docker's internal architecture helps you debug problems, optimize builds, and design systems correctly....
Master this concept and view production exercises.
An image is a read-only template used to create containers. Think of it as a blueprint — the image is the plan, the cont...
A Dockerfile is a plain text file that contains instructions for building a Docker image. Docker reads the file top to b...
Multi-stage builds let you use multiple FROM statements in one Dockerfile. This lets you build your application in one e...
Just like .gitignore, a .dockerignore file tells Docker which files to exclude from the build context — the set of files...
A container is a running instance of an image. While an image is static (like a class in programming), a container is dy...
Docker captures all stdout and stderr output from your containers and stores them. Understanding logs is essential for d...
By default, all data written inside a container is lost when the container stops or is deleted. Volumes solve this by st...
Docker networking controls how containers communicate with each other, with the host, and with the outside world....
Docker Compose is a tool for defining and running multi-container applications. Instead of running multiple docker run c...
Master this concept and view production exercises.
Security in Docker operates at multiple levels: daemon, image, and container. Neglecting any level puts your system at r...
Master this concept and view production exercises.
Master this concept and view production exercises.
Master this concept and view production exercises.
Aligns directly with DevOps, Site Reliability (SRE), and Platform Engineering job descriptions.