How is multi-container application management implemented using Docker Compose?

Docker Compose manages multi-container applications using a configuration file docker-compose.yml, which describes all services, their images, networks, volumes, and dependencies.

Main features:

• Launch all containers with a single command docker-compose up.
• Define the order of startup and dependencies between services.
• Share networks and volumes.
• Scale services using the replicas or scale parameter.

Example of a simple docker-compose.yml:

version: '3'
services:
  web:
    image: nginx
    ports:
      - "80:80"
  db:
    image: postgres
    environment:
      POSTGRES_PASSWORD: example

Thus, Docker Compose simplifies orchestration and management of multiple containers as a single application.