It will be quite uncommon to just use this compose file, it's likely you are extending this from another project. That's the main context of this container.

Sample

Run multiple databases

initdb/init.sql


-- Create BookStack database and user
CREATE DATABASE IF NOT EXISTS bookstack_db;
CREATE USER IF NOT EXISTS 'bookstack_user'@'%' IDENTIFIED BY 'bookstack_password';
GRANT ALL PRIVILEGES ON bookstack_db.* TO 'bookstack_user'@'%';

-- Create WordPress database and user
CREATE DATABASE IF NOT EXISTS wordpress_db;
CREATE USER IF NOT EXISTS 'wordpress_user'@'%' IDENTIFIED BY 'wordpress_password';
GRANT ALL PRIVILEGES ON wordpress_db.* TO 'wordpress_user'@'%';

FLUSH PRIVILEGES;