Docker Php and apache install Composer

I want to start project and make my own framework for technical future work test, so i want to install composer for install some library, but when i execut

docker-compose exec php bash

terminal say to me service “php” is not running

My question is : What is the right container for running composer ? apache, php ? Create a composer container ?

I have docker-compose.yml

version: "3.8"
services:
  apache:
    container_name: apache
    build: ./docker/apache
    links:
      - php
    ports:
      - "81:80"
    volumes:
      - ./src:/usr/local/apache2/htdocs
  php:
    container_name: php
    build: ./docker/php
    ports:
      - "9000:9000"
    volumes:
      - ./src:/usr/local/apache2/htdocs
    working_dir: /usr/local/apache2/htdocs

with Docker file for apache

// apache/Dockerfile

FROM httpd:2.4.51

COPY apache.conf /usr/local/apache2/conf/apache.conf

RUN echo "Include /usr/local/apache2/conf/apache.conf" 
    >> /usr/local/apache2/conf/httpd.conf

with apache.conf

LoadModule deflate_module /usr/local/apache2/modules/mod_deflate.so
LoadModule proxy_module /usr/local/apache2/modules/mod_proxy.so
LoadModule proxy_fcgi_module /usr/local/apache2/modules/mod_proxy_fcgi.so

<VirtualHost *:80>
    ProxyPassMatch ^/(.*.php(/.*)?)$ fcgi://php:9000/usr/local/apache2/htdocs/$1

    DocumentRoot /usr/local/apache2/htdocs

    <Directory /usr/local/apache2/htdocs>
        Options -Indexes +FollowSymLinks
        DirectoryIndex index.php
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>

and DockerFile for PHP with COMPOSER installation

FROM php:8.1-fpm
WORKDIR /var/www

RUN apt-get update
RUN docker-php-ext-install pdo pdo_mysql mysqli

RUN apt-get install -y autoconf pkg-config libssl-dev
RUN pecl install mongodb
RUN echo "extension=mongodb.so" >> /usr/local/etc/php/conf.d/mongodb.ini

COPY --from=composer /usr/bin/composer /usr/bin/composer