version: '3'
services:
  db:
    image: postgres:10.4-alpine
    ports:
    - 5432:5432
    volumes:
    - postgres:/var/lib/postgresql/data
  redis:
    image: redis:4.0-alpine
    ports:
    - 6379:6379
    volumes:
    - redis:/usr/local/etc/redis/redis.conf
    - redis-data:/data
volumes:
  postgres:
  redis:
  redis-data:

# volumes
#  postgres:
#    driver: local
#    driver_opts:
#      type: none
#      device: <path to postgres data>
#      o: bind