Enable Docker Wordpress image to start new WordPress container directly with SQLite

首先检查链接的 Dockerfile、docker-entrypoint.sh 和 WordPress setup-config.php，以了解所需的 SQLite 依赖项、插件安装和设置行为应放在哪里。使用示例 docker-compose.yml 作为验收场景：新的 WordPress 容器应能够在启用 WORDPRESS_USE_SQLITE 的情况下启动，而无需外部 MySQL 数据库。

It has been very silent around the sqlite integration. I think a lot more people might test it, if the setup would not require an additional external database to start. I tried to create a Dockerfile using FROM Wordpress:latest, but it seems there are a couple of challenges.

To get a smooth experience, we need

1. Integration of the required SQLite dependencies into the Docker WordPress image (Dockerfile)
   (sqlite3, libsqlite3-dev, php-sqlite3, pdo_sqlite?)
2. Enable install of WP SQLite plugin during first startup, maybe by using an ENV VAR (docker-entrypoint.sh)
3. Skip required MYSQL during setup, maybe by using an ENV VAR (setup-config.php)
4. Add the necessary SQLite settings, maybe by using an ENV VAR (probably in setup-config.php)

It doesn't look too complicated to me, it just needs a coordinated effort. Who can implement those changes (shell, php) and who is controlling those files to update them? How is the regular process? Who needs to agree to this?

The Docker Wordpress image size is 230MB, I don't think the SQL dependencies of around 1-3MB really matter. And I assume if not used, they should not introduce any kind of security issue.

Imagine you can spin up a new Wordpress with a simple example docker-compose.yml for wordpress:

services:
  wordpress:
    image: wordpress
    restart: always
    ports:
      - 8080:80
    environment:
      WORDPRESS_USE_SQLITE: true
    volumes:
      - wordpress:/var/www/html