# version: "3"

# services:
#   web:
#     build: .
#     ports:
#       - "5000:5000"
#     volumes:
#       - .:/app


# version: "3"

# services:
#   web:
#     build: .
#     ports:
#       - "5000:5000"
#     volumes:
#       - .:/app
#     depends_on:
#       - db

#   db:
#     image: mongo
#     ports:
#       - "27017:27017"


version: "3"

services:
  web:
    build: .
    ports:
      - "5000:5000"
    volumes:
      - .:/app
    depends_on:
      - db

  db:
    image: mongo
    ports:
      - "27017:27017"
    volumes:
      - mongo-data:/data/db   # 👈 THIS IS IMPORTANT

volumes:
  mongo-data:   # 👈 declare volume