Docker
🐳 What is Docker? Docker is a platform to package applications into containers . Docker is an open-source platform that enables developers to build, deploy, run, update, and manage applications using containers, which are lightweight, portable, and self-sufficient units that package an application and its dependencies together. A container is a lightweight, portable, isolated environment that includes your app + dependencies + OS libraries. Think of it as “ship your code with everything it needs” so it runs the same anywhere — your laptop, cloud, or production server. 🟢 Docker Benefits (Simple Points) 1. Consistent environment everywhere Same code runs the same way on any machine (dev, QA, prod). 2. Lightweight (compared to VMs) Starts in seconds Uses less CPU and RAM 3. Easy deployment Build once → run anywhere Faster releases 4. Isolation Each container has its own dependencies No version conflicts 5. Easy scaling Run multiple containers ...