🐳 Docker Learning

A beginner-friendly repository to learn Docker from the basics. This repository contains Dockerfiles, multi-stage builds, Docker Compose examples, commonly used commands, and common interview questions.

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📚 Contents

• Docker Basics
• Dockerfile Examples
• Multi-Stage Builds
• Docker Compose
• Docker Commands
• Environment Variables
• Volumes
• Networks
• Best Practices
• Sample Projects
• Interview Questions & Answers

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📂 Repository Structure

docker-learning/
├── dockerfile/
├── multistage/
├── docker-compose/
├── commands/
├── interview-questions/
├── examples/
├── projects/
├── best-practices/
├── .dockerignore
├── .gitignore
└── README.md

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🎯 What You'll Learn

• What Docker is and why it's used
• Building Docker images
• Running and managing containers
• Writing efficient Dockerfiles
• Multi-stage Docker builds
• Docker Compose for multi-container applications
• Managing volumes and networks
• Working with environment variables
• Optimizing Docker images
• Docker best practices
• Common interview questions

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🚀 Prerequisites

• Basic knowledge of the command line
• Docker Desktop or Docker Engine installed
• Git

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▶️ Getting Started

Clone the repository:

git clone https://github.com/ahsan598/docker-learning.git
cd docker-learning

Navigate to any folder and follow the examples provided.

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📖 Topics Covered

Dockerfile

• Basic Dockerfile
• Copying files
• Installing dependencies
• Exposing ports
• CMD vs ENTRYPOINT
• Environment variables

Multi-Stage Builds

• Build stage
• Runtime stage
• Image optimization
• Production-ready builds

Docker Compose

• Multiple services
• Networks
• Volumes
• Environment variables
• Compose commands

Commands

• Image commands
• Container commands
• Network commands
• Volume commands
• Cleanup commands

Best Practices

• Use lightweight base images
• Reduce image size
• Cache dependencies
• Avoid running as root
• Use .dockerignore
• Keep images secure