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Module 21 — CI/CD & DevOps Basics

What Is CI/CD?​

Continuous Integration (CI) — automatically run tests, linting, and type checks on every push. Continuous Deployment (CD) — automatically deploy when CI passes on the main branch.

This catches bugs before they reach users and makes deployment a non-event.

Learning Objectives​

  • Write GitHub Actions workflows
  • Run tests and type checks in CI
  • Use Docker to containerize your Node.js API
  • Manage environment variables securely
  • Set up automated deployment on merge

Module Lessons​

  1. GitHub Actions
  2. Docker Basics
  3. Environment Variables

Challenge​

Set up a full CI/CD pipeline for your Express API:

  • CI: TypeScript check + tests on every PR
  • CD: Auto-deploy to Railway on merge to main

View Challenge →