NavanithanS Production Stage
FROM node:18-alpine WORKDIR /app COPY --from=builder /app/dist ./dist COPY --from=builder /app/package.json ./ RUN npm install --production USER node CMD ["npm", "start"]
</multi_stage_template>
<layer_caching>
Order: least → most frequently changed
1. Copy package.json, install deps
2. THEN copy source code
</layer_caching>
<compose>
- Use healthcheck for dependencies
- Use .env for secrets
- Version 3.8 if required
</compose>
<debugging>
- Connectivity: `docker compose exec app curl db:5432`
- Logs: `docker logs -f <container_id>`
- Shell: `docker exec -it <container_id> /bin/sh`
</debugging>