Help make xcgd/odoo compose file

Hi,

I am pretty new to docker. I wanted to make an Odoo 8 container using xcgd/odoo’s image file.
Below is my docker compose file. The web container died with exit code 0 soon after I docker-compose up the yml.

I know that xcgd/odoo requires to link the db container, I’ve seen it in the documentation.

```
$ docker run -p 8069:8069 --rm --name="xcgd.odoo" --link pg93:db xcgd/odoo:7.0 start
```

Am I missing this link in my yaml? I thought I already define the link using network?

Can anyone point my mistake?

My yaml file

version: '3.3'

services:
  # Web Application Service Definition
  # --------
  #
  # All of the information needed to start up an odoo web
  # application container.
  web:
    image: xcgd/odoo:8.0
    depends_on:
        - db

    # Port Mapping
    # --------
    #
    # Here we are mapping a port on the host machine (on the left)
    # to a port inside of the container (on the right.) The default
    # port on Odoo is 8069, so Odoo is running on that port inside
    # of the container. But we are going to access it locally on
    # our machine from localhost:9000.
    #ports:
    #  - 80:8069

    # Data Volumes
    # --------
    #
    # This defines files that we are mapping from the host machine
    # into the container.
    #
    # Right now, we are using it to map a configuration file into
    # the container and any extra odoo modules.
    volumes:
      - ./config:/etc/odoo
      - ./addons/logic:/mnt/logic-addons
      - ./addons/data:/mnt/data-addons

    # Odoo Environment Variables
    # --------

    # The odoo image uses a few different environment
    # variables when running to connect to the postgres
    # database.
    #
    # Make sure that they are the same as the database user
    # defined in the db container environment variables.
    environment:
      - HOST=db
      - USER=odoo
      - PASSWORD=odoo
      - VIRTUAL_HOST=proc.fullertonhealth.co.id
      - VIRTUAL_PORT=8069
      - LETSENCRYPT_HOST=proc.fullertonhealth.co.id
      - LETSENCRYPT_EMAIL=info@fullertonhealth.co.id

    expose:
      - 8069

  # Database Container Service Definition
  # --------
  #
  # All of the information needed to start up a postgresql
  # container.
  db:
    image: postgres:9.5

    # Database Environment Variables
    # --------
    #
    # The postgresql image uses a few different environment
    # variables when running to create the database. Set the
    # username and password of the database user here.
    #
    # Make sure that they are the same as the database user
    # defined in the web container environment variables.
    environment:
      - POSTGRES_PASSWORD=odoo
      - POSTGRES_USER=odoo
      - POSTGRES_DB=postgres  # Leave this set to postgres

networks:
  default:
    external:
      name: nginx-proxy