docker compose -f docker-compose.yml -f docker-compose.prod.yml up
project/ ├── docker-compose.yml ├── app/ │ ├── Dockerfile │ └── index.js └── .env a developer's essential guide to docker compose pdf
services: app: depends_on: db: condition: service_healthy db: image: postgres healthcheck: test: ["CMD-SHELL", "pg_isready -U postgres"] interval: 5s retries: 5 docker compose -f docker-compose
One command to spin up a dev environment identical to production dependencies (databases, caches, queues). 2. Core Concepts | Concept | Description | |---------|-------------| | Service | A containerized application (e.g., web app, database) | | Network | Isolated communication layer between services | | Volume | Persistent data storage (survives container restarts) | Default behavior: All services in the same Compose project automatically join a default network and can reach each other using their service name as hostname. 3. The docker-compose.yml File – Anatomy version: '3.8' # Latest stable version (March 2025) services: app: build: ./app ports: - "3000:3000" environment: - NODE_ENV=development depends_on: - db - redis a developer's essential guide to docker compose pdf