Docker Compose volume not mount for mysql image

I am trying to create a new Docker image with docker-compose.yml file. Here is my docker-compose.yml file.

version: '3.6'
services:
  php-fpm:
      build:
       context: ./images/php-fpm/
       dockerfile: Dockerfile
      container_name: lempdock_php-fpm_1
      volumes:
        - ./www:/var/www
      depends_on:
        - redis
        - mysql
  nginx:
      build:
        context: ./images/nginx
        dockerfile: Dockerfile
      container_name: lempdock_nginx_1
      ports:
        - "80:80"
        - "443:443"
      volumes:
        - ./www:/var/www
        - ./images/nginx/nginx.conf:/etc/nginx/nginx.conf
        - ./images/nginx/sites/:/etc/nginx/sites-available
        - ./images/nginx/conf.d/:/etc/nginx/conf.d
      external_links:
        - lemp_dock_nginx_1
      depends_on:
        - php-fpm
  mysql:
      build:
        context: ./images/mysql
        dockerfile: Dockerfile
      container_name: lempdock_mysql_1
      restart: always
      volumes:
        - ./data/mysql:/var/lib/mysql
      external_links:
        - lempdock_mysql_1
      ports:
        - "33066:3306"
      expose:
        - 3306
  redis:
      image: redis
      container_name: lempdock_redis_1
      ports:
        - "6379:6379"
      volumes:
        - ./data/redis:/data/redis
      external_links:
        - lempdock_redis_1

This is my folder structure

- /data
---- /mysql
---- /redis
- /images # contain other sub foldes with Dockerfile
- /lemp
-/www # to contain my souce code

As per my docker-compose.yml file, my www folder from root mounted and synced properly with php-fpm and nging docker image, but my mysql data not synced with data/mysql folder.

What I am missing here and How can I get my MySQL data folder mounted to my host computers data/mysql folder?

This is the Github link https://github.com/arifulhb/lempdock if anyone wants to check out this.

Copyright License：
Author:「Ariful Haque」,Reproduced under the CC 4.0 BY-SA copyright license with link to original source & disclaimer.
Link to：https://stackoverflow.com/questions/55146149/docker-compose-volume-not-mount-for-mysql-image