Learn DOCKER with Real Code Examples

Install Docker Engine (Windows, macOS, Linux)

Install Docker CLI for command-line operations

Verify installation with `docker --version`

Optionally install Docker Compose

Start Docker daemon/service and test container run

Install Docker Engine and CLI

Install Docker Compose if needed

Configure host OS for Docker usage

Verify installation with `docker info`

Run sample container to test setup

Dockerfile - image build instructions

docker-compose.yml - multi-container setups

.dockerignore - files to exclude from build context

configs/ - environment configs

data/ - persistent volumes

docker build -t <name> . - build image

docker run -p <host>:<container> <image> - run container

docker ps - list running containers

docker stop <container> - stop container

docker-compose up - run multi-container apps

Handled inside containerized application

Docker provides OS-level locale support

Environment variables can specify language settings

External i18n tools can be bundled in images

UTF-8 content supported by default

APIs accessible through mapped ports

Containerized apps consistent across dev/test/prod

Network configuration allows service discovery

Exposed ports secured with firewall or TLS

Containerized services can integrate with CI/CD pipelines

Mostly backend containerization

Front-end served via containerized web servers

Optional integration with GUI apps using X11 or VNC

Static files served from containers

No default UI styling - handled by application inside container

Containers are stateless by default

Use volumes or external storage for persistence

State can be maintained in databases or caches

Networking ensures communication between services

Containers can be scaled horizontally with identical state handling

Persistent volumes for critical data

Bind mounts for development convenience

Environment variables for configuration

Secrets management for sensitive info

Database or cache containers for stateful services