docker-postgis/docker-compose.yml

# docker-compose build
# docker-compose up -d web
version: '2.1'
volumes:
  dbbackups:
  postgis-data:

services:

  db:
    image: kartoza/postgis:11.0-2.5
    volumes:
      - postgis-data:/var/lib/postgresql
      - dbbackups:/backups
    environment:
      # If you need to create multiple database you can add coma separated databases eg gis,data
      - POSTGRES_DB=gis
      - POSTGRES_USER=docker
      - POSTGRES_PASS=docker
      - ALLOW_IP_RANGE=0.0.0.0/0
      # Add extensions you need to be enabled by default in the DB. Default are the three specified below
      - POSTGRES_MULTIPLE_EXTENSIONS=postgis,hstore,postgis_topology,ogr_fdw
    ports:
      - 5434:5432
    restart: on-failure
    healthcheck:
      test: "exit 0"

  dbbackups:
    image: kartoza/pg-backup:11.0
    hostname: pg-backups
    volumes:
      - dbbackups:/backups
    links:
      - db:db
    environment:
      - DUMPPREFIX=demo
      - PGUSER=docker
      - PGPASSWORD=docker
      - PGDATABASE=gis
      - PGPORT=5432
      - PGHOST=db
    restart: on-failure
    depends_on:
      db:
        condition: service_healthy