containerization-docker

name	containerization-docker
description	Docker image conventions for xberg-io services — multi-stage builds, layer caching, security hardening (non-root, vulnerability scanning, no baked secrets), signal handling and healthchecks, and tagging. Load when writing or editing Dockerfiles, container build pipelines, or image release tagging.

Containerization / Docker

• Multi-stage builds: full toolchain builder → minimal runtime (Alpine/Distroless/Scratch)
• Layer caching: copy Cargo.toml/Cargo.lock first, then source; use BuildKit mount caches
• Security: non-root user, Trivy/Grype scanning (fail on HIGH/CRITICAL), no secrets in image
• Signal handling: tini/dumb-init as PID 1, HEALTHCHECK for orchestrator detection
• Tagging: semantic version + commit SHA, never reuse tags