Learn DOCKER with Real Code Examples

Containerize a Node.js REST API

Run a MySQL database container and connect app

Use Docker Compose to run web app + database

Build multi-stage Dockerfile for optimized image

Deploy containers to cloud platforms like AWS ECS or Azure

Check logs with `docker logs <container>`

Inspect running containers with `docker ps`

Remove stopped containers/images with `docker rm` / `docker rmi`

Verify ports and networks are properly exposed

Debug build issues by testing Dockerfile layers individually

Run unit tests inside containers

Test multi-container apps with Compose

Use containerized testing databases

Validate environment consistency across dev/test/prod

Automate tests in CI/CD pipelines using Docker

Standalone containers on servers

Docker Compose for multi-service applications

Docker Swarm for orchestration

Kubernetes or OpenShift deployment

Cloud container services (AWS ECS, GCP Cloud Run, Azure Container Instances)

Docker Engine - container runtime

Docker CLI - command-line management

Docker Compose - multi-container orchestration

Docker Hub - container registry

Docker Desktop - GUI management on Windows/macOS

CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins)

Container registries (Docker Hub, AWS ECR, GCP Artifact Registry)

Kubernetes for orchestration

Monitoring with Prometheus, Grafana, or ELK stack

Networking tools and service discovery for containers

Use multi-stage builds for small images

Keep containers stateless when possible

Use volumes for persistent data

Automate builds and deployments with CI/CD

Regularly prune unused images and containers

Learning Docker CLI and command options

Writing efficient Dockerfiles

Managing multi-container dependencies

Networking and volume management

Security best practices and image maintenance