Overview
Ever written code that works perfectly on your computer, but breaks the moment a friend tries to run it? We've all been there. This is where Docker comes in. Think of Docker as a magic box for your application. You put your code, its dependencies (like that specific version of Node.js), and all its settings into this box, called a container. Now, you can ship this box to anyone, and it will run exactly the same, every single time.
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