CI/CD Concepts

The fundamentals behind reliable pipelines.

Understand the building blocks of CI/CD: runners, exit codes and signals, caching, artifacts, concurrency, secrets, and pipeline reliability. Background knowledge that makes debugging faster.

Runners & compute

How CI runners work and where cost comes from.

Self-hosted vs hosted costGitHub-hosted runners bill per minute; self-hosted runners shift cost to compute and ops. Learn how to compar…

Caching & artifacts

Speeding up pipelines reliably.

CI caching explainedHow CI caching works, what to cache (dependencies, build outputs, Docker layers), how cache keys and restore…

Explore other topics

GitHub ActionsWorkflow, runner, and YAML errors - diagnosed and fixed. Node.js & npmnpm, yarn, and pnpm failures in CI - solved. DockerBuild, run, compose, and registry errors - explained. Pythonpip, poetry, venv, and pytest failures - fixed. Java & JVMMaven, Gradle, and JVM failures in CI - resolved. GoGo build, module, and test failures - diagnosed.