Docker multi-container interconnection problem (php, composer)

I have created a dockerFile and docker-compose.yml:

Dockerfile

FROM php:7
RUN apt-get update -y && apt-get install -y libmcrypt-dev openssl
RUN docker-php-ext-install pdo mcrypt mbstring
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
WORKDIR /app
COPY . /app

CMD php artisan serve --host=0.0.0.0 --port=8000
EXPOSE 8000

docker-compose.yml

version: "3"
services:
  web:
    build:
        context: .
        dockerfile: ./Dockerfile
    ports:
        - 3021:8000
    volumes:
        - ./laravel-app:/app

when I execute docker-compose up-- force-recreate-d , laravel app will execute correctly on 127.0.0.1 force-recreate 3021 .

I have seen a lot of docker-composer articles on the web advocating minimizing container, so I would like to ask whether there is any way to rewrite this docker-compose.yml? using the official image of php and composer

. < hr >

the following is my test:

version: "3"
            
services:
    php:
        image: php:7-fpm
        ports: 
          - "3021:8000"
        volumes:
            - ./laravel-app:/app
    composer:
        image: composer:latest
        volumes:
            - ./laravel-app:/app
        working_dir: /app
        command: ["install","php artisan serve --host=0.0.0.0"]
        depends_on:
            - php

after completing this docker-compose.yml, I run docker-compose up-- force-recreate-d , however, I did not get any information on 127.0.0.1 force-recreate 3021 .

I then ran docker-compose ps and docker-compose log , and found that container for composer was not started and had the following error information

Invalid argument php artisan serve --host=0.0.0.0. Use "composer require php artisan serve --host=0.0.0.0" instead to add packages to your composer.json.

how do I modify the subscription?

version: '3' services: nginx: hostname: nginx build: context: ./nginx dockerfile: Dockerfile ports: - 80:80 networks: - lnmp volumes: - ./wwwroot:/usr/local/nginx/html php: hostname: php build: context: ./php dockerfile: Dockerfile networks: - lnmp volumes: - ./wwwroot:/usr/local/nginx/html mysql: hostname: mysql image: mysql:5.6 ports: - 3306:3306 networks: - lnmp volumes: - ./mysql/conf:/etc/mysql/conf.d - ./mysql/data:/var/lib/mysql command: --character-set-server=utf8 environment: MYSQL_ROOT_PASSWORD: 123456 MYSQL_DATABASE: admin MYSQL_USER: admin MYSQL_PASSWORD: admin123456 networks: lnmp: