image: node
pipelines:
  default:
- step:
    script:
      - npm install
      - npm test
    services:
      - postgres

definitions:
   services:
      postgres:
        image: postgres
        environment:
           POSTGRES_DB: 'pipelines'
           POSTGRES_USER: 'test_user'
           POSTGRES_PASSWORD: 'test_user_password'

definitions:
   services:
     postgres:
        image: your_custom_image_based_on_postgres
        environment:
           POSTGRES_DB: 'pipelines'
           POSTGRES_USER: 'test_user'
           POSTGRES_PASSWORD: 'test_user_password'