Learn DOCKERFILE with Real Code Examples

Dockerfile instructions -> build context -> intermediate layers -> final Docker image

Each layer is cached and reusable

Images stored in local or remote registries

Containers instantiated from images run isolated processes

Supports multi-stage builds for optimized images

Dockerfile instructions -> intermediate layers -> final image -> container runtime

Each instruction creates a new layer

Layers cached for faster rebuilds

Containers run isolated from host OS

Supports multi-stage builds for optimized images

Single-stage build for simple apps

Multi-stage build for compile + runtime separation

Minimal base image with added dependencies

Multi-container app with Docker Compose

Container orchestration with Kubernetes or Swarm

Microservices architecture with multiple containers

CI/CD pipelines that build and deploy Docker images

Serverless + container hybrid deployments

Stateless web apps with NGINX + backend APIs

Data processing pipelines in isolated containers

Declarative image building

Layered filesystem for caching

Lightweight and portable containers

Reproducibility and automation

Integration with orchestration and CI/CD

Use multi-stage builds to reduce image size

Leverage build cache to speed up repeated builds

Tag images for environment and versioning

Use CI/CD pipelines for automated builds

Orchestrate multiple containers with Compose/Kubernetes

Refactor legacy scripts into Dockerfile instructions

Split large builds into multi-stage Dockerfiles

Replace OS-specific commands with portable alternatives

Update base images for security and compatibility

Test builds on target architecture platforms