datahub/docker/postgresql/docker-compose.yml

---
version: '3.5'
services:
  postgres:
    container_name: postgres
    hostname: postgres
    image: postgres:12.3
    restart: always
    environment:
      POSTGRES_USER: datahub
      POSTGRES_PASSWORD: datahub
    ports:
      - '5432:5432'
    volumes:
      - ./init.sql:/docker-entrypoint-initdb.d/init.sql

networks:
  default:
    name: datahub_network