version: '3'

services:
  # Service for Traefik, a modern HTTP reverse proxy and load balancer.
  traefik:
    image: traefik:v2.10
    ports:
      # Map port 80 in the container to port 80 on the host.
      - "80:80"
      # Map port 8080 in the container (Traefik's dashboard) to port 8080 on the host.
      - "8080:8080"
    # Mount the Docker socket to allow Traefik to listen to Docker's API.
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ./traefik/traefik.yml:/traefik.yml:ro
      - ./traefik/config.yml:/config.yml:ro
    # Connect this service to the traefik_public network.
    networks:
      - traefik_public

# Define networks used in this docker-compose file.
networks:
  # Public-facing network that Traefik uses. Marked as external to indicate it may be defined outside this file.
  traefik_public:
    external: true