docker-compose.yml

version: '2'

# Default network is an external network created by the user.
# Projects add vhost containers to this network.
networks:
  default:
    external:
      name: auto

services:

  # The nginx proxy that autoconfigures itself with vhosts for containers that
  # have the `VIRTUAL_HOST` environment variable set.
  # https://hub.docker.com/r/jwilder/nginx-proxy/
  nginx:
    image: jwilder/nginx-proxy:alpine
    container_name: auto-nginx
    # Publish the HTTP port on the host.
    ports:
      - '80:80'
    # Needs the Docker socket to inspect other containers.
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
    # Keep running through restarts.
    restart: always

  # The dnsmasq instance that responds to all requests for the `test`
  # top-level domain with `127.0.0.1`, which is the nginx proxy.
  # https://hub.docker.com/r/andyshinn/dnsmasq/
  dnsmasq:
    image: andyshinn/dnsmasq
    container_name: auto-dnsmasq
    command:
      - '--address=/test/127.0.0.1'
      - '--server=8.8.8.8'  # Forward to Google DNS.
    # Dnsmasq needs this capability.
    cap_add:
      - NET_ADMIN
    # Publish the DNS ports on the host.
    ports:
      - '53:53'
      - '53:53/udp'
    # Keep running through restarts.
    restart: always