Docker setup: Dockerfile best practices, multi-stage, compose, security, size optimization.
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.dockerignore creado antes de cualquier COPY (excluye .git, node_modules, .env, coverage, *.md)builder separado del stage runtime:latest (ej: golang:1.22-alpine, node:20-alpine)distroless (Go) o node:20-alpine (TS) o nginx:alpine (React)USER nonroot o usuario no-root en stage runtimeHEALTHCHECK presente en cada serviciotini/dumb-init en Node (Go nativo); CMD con exec formdocker-compose.yml con depends_on: condition: service_healthydocker-compose.override.yml para dev-only (volúmenes, puertos) — no commiteado a prodENV ni en build args — solo via env vars en runtime o mountstrivy image o docker scout en CI antes de push al registryread_only, cap_drop: [ALL], no-new-privileges, límites de memoria y PIDs (ver references/checklists.md)Generate production-ready Dockerfiles and docker-compose for Go, TypeScript, and React stacks.
| Stack | Build stage | Runtime stage |
|---|---|---|
| Go | golang:<version>-alpine | gcr.io/distroless/static-debian12:nonroot |
| Node/TS | node:<version>-alpine | node:<version>-alpine + dumb-init/tini |
| React (static) | node:<version>-alpine | nginx:<version>-alpine |
→ Read references/checklists.md for Dockerfile best practices (10 items), security checklist (8 items), runtime hardening, and health check patterns
| Concern | Dev | Prod |
|---|---|---|
| Build target | builder stage (for hot reload) | runtime stage |
| Volumes | Source mounted for live reload | None (baked in) |
| Env vars | .env file, LOG_LEVEL=debug | Injected by orchestrator |
| Ports | Exposed to host | Internal only (behind LB) |
| Depends_on | condition: service_healthy | Managed by orchestrator |
Use docker-compose.override.yml for dev-only settings (auto-applied, not committed to prod).
→ Read references/compose-and-debugging.md for multiple compose files and
config, profiles, watch mode, multi-platform builds, and a debugging table (exit codes, healthchecks, networking, volumes, disk)
→ Read references/size-optimization.md for image size reduction techniques
→ Read references/anti-patterns.md for 8 common Docker anti-patterns
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