What is YAML? The complete guide to YAML syntax and use casesYAML (YAML Ain't Markup Language) is a human-readable data serialization format used for configuration files, CI/CD pipelines, and cross-language data exchange. This guide explains YAML syntax, key features, common tools, and security pitfalls.How to use Docker Compose: multi-container apps explainedLearn Docker Compose to run multi-container apps from one YAML file: services, networks, volumes, health checks, Compose Watch, env vars, docker compose up and common commands — with a real Node.js example.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. 