A beginner-friendly look at how automation tests your code, builds your app, and gets it ready to ship

Why Do Developers Need CI/CD?

Imagine a developer who finishes a small feature on Friday afternoon. Before releasing it, they run the tests by hand, build the application, package it, and prepare the release. It takes twenty minutes. Next week, they do it again. And again.

Eventually something gets skipped: a test isn't run, a dependency is out of date on one laptop, or the release is built from the wrong version of the code. The bug reaches users, and nobody can say how.

Automation reduces this repetitive work and catches errors earlier, when they're cheaper to fix. That's the idea behind CI/CD, and here you'll see how GitHub Actions and Docker make it happen.

What Is a CI/CD Pipeline?

Continuous Integration (CI) means automatically checking and testing code changes whenever they're made.…