Why Docker for Web Development?
Docker solves the "works on my machine" problem by packaging your application with all its dependencies.
Key Benefits
- Consistent environments across development, staging, production
- Easy database setup - PostgreSQL, Redis, MongoDB in seconds
- Team onboarding - New developers start in minutes, not hours
- Isolated services - Each service runs independently
- Deployment - Same container works everywhere
Essential Docker Concepts
- Image: Blueprint for a container (like a class)
- Container: Running instance of an image (like an object)
- Dockerfile: Instructions to build an image
- Docker Compose: Run multiple containers together
- Volume: Persist data outside containers
Common Setup for Web Developers
A typical Docker Compose setup includes:
- Node.js app container
- PostgreSQL database container
- Redis cache container
- Nginx reverse proxy (production)
Best Practices
- Use multi-stage builds for smaller images
- Never store secrets in Docker images
- Use .dockerignore to exclude node_modules
- Use named volumes for database data
- Pin specific versions, not latest tag
Need help with Docker setup? I containerize all production applications.