Comprehensive guide to mastering GitLab CI/CD: explains pipelines, stages, and jobs; configuring .gitlab-ci.yml; best practices (keep it simple, templates, continuous testing/deployment, performance monitoring); advanced features (env vars, cache/artifacts, service containers); plus a microservices example deploying to Kubernetes with Helm and monitoring via Prometheus/Grafana—streamlining workflows, reducing errors, and boosting productivity.
