GitHub Actions Documentation
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Official free CI/CD docs and examples
More resources on Continuous Integration
CircleCI Learn
Free tutorials and guides for CI pipelines
Martin Fowler's CI Articles
In-depth articles on CI practices
Jenkins Pipeline Tutorial for Beginners
Step-by-step Jenkins CI setup
Continuous Integration: Improving Software Quality and Reducing Risk
Continuous Integration: Improving Software Quality and Reducing Risk - A book resource
jenkins.io
Jenkins.io is the official site for the Jenkins automation server, providing comprehensive documentation, tutorials, and downloads to implement CI/CD. It covers getting started, Jenkins Pipeline (and Declarative Pipeline), plugin catalog, administration guides, and ways to contribute to the project.
circleci.com
CircleCI is a continuous integration and delivery platform that automates building, testing, and deploying software. The site offers product details, getting-started guides, tutorials, documentation, sample pipelines, and an orb registry to learn CI/CD.