📌 Core Docker Concepts (Must-Know)

✅ 1️⃣ What is Docker?

• Why use containers? Difference between VMs and Containers
• Benefits: Isolation, Portability, Scalability

✅ 2️⃣ Docker Architecture & Internals

• Docker Daemon (Manages Docker objects)
• Docker CLI (Command-line interface)
• Docker Engine (Runs containers)
• Container vs Image vs Layer
• How Union File System Works in Docker

✅ 3️⃣ Docker Installation & Setup

• Install Docker on Windows, Linux, Mac
• Basic Docker Commands (docker run, docker ps, docker stop)

🔥 Images & Containers (FAANG-Level)

✅ 4️⃣ Docker Images & Layers

• Dockerfile (How to write an optimized Dockerfile)
• Build Context & .dockerignore
• Multi-Stage Builds (Reduce image size)
• Alpine vs Ubuntu vs Debian base images