Imagine manually doing this every time you release an application:

Pull code Install dependencies Run tests Build application Copy files Configure server Restart application

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It works.

But it's repetitive and error-prone.

CI/CD automates much of this process.

Continuous Integration

Continuous Integration means frequently integrating code changes and automatically validating them.

A pipeline might run:

git push ↓ Install dependencies ↓ Lint ↓ Run tests ↓ Build

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If a test fails, the team gets immediate feedback.

Continuous Delivery

Continuous Delivery focuses on keeping software ready to deploy.

The pipeline may produce a deployment-ready artifact whenever code passes validation.

Continuous Deployment

Continuous Deployment goes further.

A successful pipeline can automatically deploy changes to production.

git push ↓ Tests ↓ Build ↓ Deploy ↓ Production

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Why CI/CD…