chore(docker): 更新mysql初始脚本

docker-compose.yml

@@ -74,7 +74,7 @@ services:
       <<: *shared-api-env
     volumes:
       - mysql_db_data:/var/lib/mysql
-      - ./docker/mysql/init:/docker-entrypoint-initdb.d
+      - ./docker/mysql/init.sql:/docker-entrypoint-initdb.d
       - ./docker/mysql/my.cnf:/etc/mysql/conf.d/custom.cnf
     ports:
       - ${MYSQL_PORT:-3306}:3306