Docker Compose Has Free Multi-Container Orchestration — Run Your Full Stack Locally

The Local Development Problem Your app needs PostgreSQL, Redis, and Elasticsearch. You could install all three on your machine. Or use a cloud service for each. Or fight with Homebrew versions. Or you could define your entire stack in one file and start everything with one command. Docker Compose: Your Full Stack in One File Docker Compose defines and runs multi-container applications. One YAML file, one command, everything running. Define Your Stack # docker-compose.yml services : app : build : . ports : - " 3000:3000" environment : - DATABASE_URL=postgres://postgres:password@db:5432/myapp - REDIS_URL=redis://redis:6379 depends_on : - db - redis db : image : postgres:16 environment : POSTGRES_PASSWORD : password POSTGRES_DB : myapp volumes : - pgdata:/var/lib/postgresql/data redis : image : redis:7-alpine volumes : pgdata : One Command docker compose up PostgreSQL, Redis, and your app — all running. All connected. Stop with Ctrl+C. Why Every Developer Should Know Compose 1. Reproducib