deployment-patterns

Provider-neutral deployment patterns - rolling, blue/green and canary strategies, feature-flag and dark launches, immutable deploys, expand/contract database migrations, health and readiness gating, zero-downtime rollouts, rollback strategy, separating deploy from release, progressive delivery, environment promotion of a single artifact, and runbook basics. Load when choosing a rollout strategy, planning a risky or schema-changing deploy, designing rollback, setting up promotion between environments, or writing a deploy runbook.