Overview
Docker is a containerization platform that packages applications with their dependencies.
Why It Matters
Docker containerization simplifies deployment and ensures consistency across environments.
Essential Commands
docker build -t app:latest .Build image from Dockerfile
docker run -p 3000:3000 app:latestRun container and publish port
docker ps -aList running and stopped containers
docker logs -f <container>Follow container logs
docker exec -it <container> shOpen shell inside running container
docker compose up -dStart multi-service stack in background
Quick Start
Master build images with dockerfiles first
Key Concepts
Build images with Dockerfiles
Manage containers and volumes
Use Docker Compose for multi-container applications
Pro Tips
- Combine multiple commands for powerful workflows
- Use aliases to speed up your command entry
- Create scripts to automate repetitive tasks
Common Pitfalls to Avoid
- • Forgetting to check the documentation for edge cases
- • Running commands without understanding their full impact
- • Not testing changes in a safe environment first