CI/CD Explained: Continuous Integration, Delivery & DeploymentCI/CD automates the path from code commit to production: continuous integration builds and tests every change, continuous delivery keeps releases ready, continuous deployment ships them automatically.How to set up CI/CD with GitHub ActionsSet up a CI/CD pipeline with GitHub Actions: create your first workflow, configure triggers, build and test your code on runners, use actions and secrets, and deploy automatically — open-license sources.How to set up SSH key authentication (GitHub + Linux)Set up SSH key authentication for GitHub and Linux servers: generate Ed25519 keys, add to ssh-agent, copy public key, and test connection — step-by-step with open-license sources. 