medium docker part 2

database-persisted.yml

database: 
    image: "postgres:alpine"
    environment: 
      POSTGRES_USER: postgres
      POSTGRES_DB: mydb
    ports: 
      - "4201:5432"
    # persist to a named volume
    volumes:
      - server_db:/var/lib/postgresql/data

volumes: 
  server_db:

Hi

you have to add dash (-) to each environment variable.

kr Marko