Config CircleCI for mysql database

Build Environment Databases
,
4 
version: 2

jobs:
  build:
    docker:
      - image: circleci/php:7.1-node-browsers
        environment:
          MYSQL_HOST: 127.0.0.1
          MYSQL_DB: mate
          MYSQL_USER: root
          MYSQL_ALLOW_EMPTY_PASSWORD: true
          MYSQL_PASSWORD:
      - image: mysql:5.7
        command: mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_bin --innodb-large-prefix=true --innodb-file-format=Barracuda
        environment:
          MYSQL_USER: root
          MYSQL_ALLOW_EMPTY_PASSWORD: true

    working_directory: ~/laravel

    steps:
      - checkout
      - run: sudo apt install -y libsqlite3-dev zlib1g-dev
      - run: sudo docker-php-ext-install zip
      - run: sudo composer self-update
      - restore_cache:
          keys:
            - composer-v1-{{ checksum "composer.lock" }}
            - composer-v1-
      - run: composer install --dev --ignore-platform-reqs
      - save_cache:
          key: composer-v1-{{ checksum "composer.lock" }}
          paths:
            - vendor
      - run:
          name: Mysql database
          command: mysql  -h 127.0.0.1 -u root -e "create database mate;"
      - run: cp .env.travis .env
      - run: php artisan key:generate
      - run: php artisan migrate
      - run: mkdir -p build/logs
      - run: php vendor/bin/phpunit tests/ --coverage-clover build/logs/clover.xml
      - run: php vendor/bin/phpcbf --standard=ruleset.xml app/
      - run: php vendor/bin/phpcs --standard=ruleset.xml app/

It shows the error mysql not found and can you pls let me know how to write code for continuous deployment on DigitalOcean droplet.