docker-compose2.yml

version: "3.9"

secrets:
  POSTGRES_PASSWORD:
    external: true

services:
  api_service:
    image: yourServerImage:latest
    deploy:
      restart_policy:
        condition: on-failure
    secrets:
      - POSTGRES_PASSWORD
    environment:
      - POSTGRES_PASSWORD_FILE=/run/secrets/POSTGRES_PASSWORD
    ports:
      - 8080:8080
    depends_on:
      - db

  db:
    image: "postgres:latest"
    deploy:
      restart_policy:
        condition: on-failure
    secrets:
      - POSTGRES_PASSWORD
    environment:
      - POSTGRES_PASSWORD_FILE=/run/secrets/POSTGRES_PASSWORD
      - POSTGRES_DB=myDb	
    ports:
      - 5432:5432
    volumes:
      - db-data:/var/lib/postgresql/data/

volumes:
  db-data: