I had trouble installing a WordPress container. I was getting errors with InnoDB. The reason was that I was too low on ram.
After some pondering I figured out that by tweaking the my.cnf file everything would be fine. So I made an image with a minimal config.
Here is the repo: https://hub.docker.com/r/m0rph/mariadb-min/
You'll find more details there.
For light weight applications this is a good way of setting up Wordpress sites and similar contraptions that demand MySQL on machines that don't have gigabytes of RAM to throw around.
Docker and containers are great!