docker-compose.yml

version: '2'
services:
  mysql:
    image: mysql:5.7
    volumes:
      - ./database:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: root
    command: --character-set-server=utf8 --collation-server=utf8_unicode_ci
    cpu_shares: 30
    mem_limit: 300M
  wordpress:
    image: wordpress:4.8.1-php7.1
    volumes:
      - ./wp-content:/var/www/html/wp-content
      - ./uploads.ini:/usr/local/etc/php/conf.d/uploads.ini
    depends_on:
      - mysql
    ports:
      - "80:80"
    environment:
      WORDPRESS_DB_PASSWORD: root
    cpu_shares: 30
    mem_limit: 200M

uploads.ini

memory_limit = 128M
upload_max_size = 64M
post_max_size = 64M
upload_max_filesize = 64M
max_execution_time = 600
max_input_time = 1000