GitHub Actions gives every repository free continuous integration and deployment, and it is the easiest way for a small project to get professional-grade automation. Tests run on every push, deployments happen automatically, and the whole pipeline lives in your repository as a simple YAML file. This guide takes you from your first workflow to a deployment pipeline.

What CI/CD Actually Does

Continuous integration means every code change is automatically tested when it is pushed, so bugs are caught before they reach users. Continuous deployment means tested code is automatically deployed to production, so releases happen in minutes instead of days. GitHub Actions runs both from YAML files in your repository, using free runners for public repositories and a generous free allowance for private ones. The result is a professional pipeline with no server to maintain.

Your First Workflow

A workflow is a YAML file in the .github/workflows directory that defines when to run and what to do. A simple workflow runs your tests on every push to the main branch: check out the code, install dependencies, run the test command. The whole file is about twenty lines, and GitHub provides templates for every major language. Start with tests only, then add deployment once the tests are green.

The Free Allowance

Public repositories get unlimited free Actions minutes, and private repositories get 2,000 free minutes a month on the free plan. That is enough for most small projects, and the minutes reset monthly. Linux runners are the cheapest and fastest, so use them unless you need Windows or macOS specifically. Cache dependencies between runs to save minutes and speed up the pipeline.

Automating Deployment

Once tests pass, add a deployment step: build the application, then deploy it to your hosting provider using a marketplace action or a simple SSH command. Store secrets like API keys and server passwords in GitHub's encrypted secrets, never in the workflow file. A deployment workflow turns a manual process that takes thirty minutes and invites mistakes into an automatic one that takes three minutes and never forgets a step.

Common Beginner Mistakes

The most common mistake is running the whole test suite on every push to every branch, which wastes minutes: run fast tests on every push and the full suite on pull requests. Another is hardcoding secrets in workflow files, which exposes them to anyone who can read the repository. A third is ignoring failing workflows: a red pipeline you ignore trains you to ignore all pipelines. Fix failures immediately, even if the fix is to update a test.

CI/CD for Solo Developers

CI/CD is not just for teams: a solo developer benefits most, because the pipeline catches the mistakes that a second pair of eyes would have caught. A test that runs on every push, a build that fails loudly, and a deployment that happens automatically are a safety net for a single person. The setup takes an afternoon, and the payoff is every deployment after that. Solo developers who skip CI/CD spend their time fixing the mistakes that a pipeline would have prevented, and the pipeline is cheaper than the fix.

Key Takeaways

- GitHub Actions runs tests and deployments from YAML files in your repo - Public repos get unlimited free minutes; private repos get 2,000 a month - Start with tests on every push, then add deployment - Store secrets in GitHub's encrypted secrets, never in workflow files

Frequently Asked Questions

Is GitHub Actions free? Yes, for public repositories it is unlimited, and private repositories get 2,000 free minutes a month. That covers most small projects completely.

GitHub Actions is professional CI/CD for free. Write a twenty-line workflow, run your tests on every push, and deploy automatically.