2023-02-05 Docker mysql:8/mariadb:10イメージの初期ユーザと同等のユーザを作成
code:sql
CREATE USER 'username'@'%' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON mydatabase.* TO 'username'@'%';
FLUSH PRIVILEGES;
https://www.digitalocean.com/community/tutorials/how-to-create-a-new-user-and-grant-permissions-in-mysql-ja
https://qiita.com/nanakenashi/items/180941699dc7ba9d0922
https://blog.mosuke.tech/entry/2018/04/21/basic-mysql-on-docker/
https://github.com/MariaDB/mariadb-docker/blob/f07f84ce55de7d7f1d85ccf2c642c4247b425ea4/docker-entrypoint.sh