Ambiente PHP 7.2 com Apache, extensões MySQL, PostgreSQL habilitados e composer instalado

docker-compose.yml

version: '3'
services:

#Apache + PHP Service
  apache-php:
    image: saitam10/apache2-php7.2
    container_name: apache2-php7.2
    restart: always
    ports:
      - "80:80"
    depends_on:
      - db
    volumes:
      - ./src:/var/www/html/:rw
  #MySQL Service
  db:
    image: mysql:5.7
    container_name: serverdb_mysql
    restart: always
    ports:
      - "3306:3306"
    environment:
      - MYSQL_ROOT_PASSWORD=admin
      - MYSQL_DATABASE=nomebanco
      - MYSQL_USER=user
      - MYSQL_PASSWORD=secret 
    volumes:
      - ./mysql/dbdata:/var/lib/mysql/
   
  #PHPMyAdmin
  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    container_name: phpmyadmin
    ports:
      - "8080:80"
    environment:
      - MYSQL_ROOT_PASSWORD=admin
      - MYSQL_USER=user
      - MYSQL_PASSWORD=secret
    depends_on:
      - apache-php 
      - db