Docker Fundamentals: Images, Containers and Compose

What you'll learn

• Explain containers, images and how they differ from virtual machines.
• Write Dockerfiles and build, tag and push images.
• Run containers with ports, environment variables and volumes.
• Connect services with networks and Docker Compose.
• Debug, secure and optimize images and containers.

Syllabus

Module 1: Getting Started

1. What Is a Container?
2. Installing Docker

Module 2: Images & Containers

1. Image vs Container
2. Pulling an Image
3. Running a Container
4. Container Lifecycle

Module 3: Writing a Dockerfile

1. Dockerfile Basics
2. Building an Image

Module 4: Running Apps

1. Exposing Ports
2. Environment Variables
3. Naming Containers

Module 5: Data & Volumes

1. Containers Are Ephemeral
2. Volumes vs Bind Mounts
3. Cleaning Up & Resource Limits

Module 6: Networking

1. The Default Bridge Network
2. Connecting Containers
3. Container-to-Host Communication
4. Inspecting & Debugging Containers

Module 7: Docker Compose

1. Why Compose?
2. A docker-compose.yml Example
3. compose up / down

Module 8: Images at Scale

1. Multi-Stage Builds
2. .dockerignore
3. Tagging & Versioning

Module 9: Registries

1. Docker Hub Basics
2. Pushing & Pulling

Module 10: Best Practices

1. Writing Efficient Dockerfiles
2. Security Basics