Help! Losing Data When Migrating My WordPress Container

I'm trying to move my WordPress site from an old PC to a new one. The original setup wasn't done by me, and now I'm facing some issues. Here's what I've done so far:

1. Created custom images for both WordPress and the database using Docker commands.
2. Set up a new docker-compose file based on the old containers.
3. Transferred the data from the old PC's /data/wordpress directory to the new one.
4. Ran the docker-compose command to start everything up.

However, after doing all this, it seems like all my data is gone and I have to set everything up from scratch again. Here's my docker-compose.yaml for reference:

```yaml
services:
wordpress:
image: custom/wordpress:1.0
container_name: wordpress
environment:
- WORDPRESS_DB_HOST=WORDPRESS_DB_HOST_EXAMPLE
- WORDPRESS_DB_USER=WORDPRESS_DB_USER_EXAMPLE
- WORDPRESS_DB_PASSWORD=WORDPRESS_DB_PASSWORD_EXAMPLE
- WORDPRESS_DB_NAME=WORDPRESS_DB_NAME_EXAMPLE
ports:
- "10000:80"
volumes:
- /data/wordpress/html:/var/www/html
depends_on:
- wordpressdb

wordpressdb:
image: custom/wordpressdb:1.0
container_name: wordpressdb
environment:
- MYSQL_ROOT_PASSWORD=MYSQL_ROOT_PASSWORD_EXAMPLE
- MYSQL_DATABASE=MYSQL_DATABASE_EXAMPLE
volumes:
- /data/wordpress/database:/var/lib/mysql
expose:
- "3306"
```