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backend: build: ./backend ports: - "8080:8080" depends_on: - database environment: - DATABASE_URL=postgres://user:password@database:5432/database

version: '3' services: frontend: build: . ports: - "80:80" depends_on: - backend environment: - BACKEND_URL=http://backend:8080 a developer's essential guide to docker compose pdf download

One day, John discovered Docker Compose. He was amazed at how easy it was to define his application's services and run them with a single command. He created a docker-compose.yml file that defined his frontend, backend, and database services, and then ran docker-compose up to start his application. backend: build: