Container command could not be invoked

Just encountered this error message while trying to bring up a docker-compose stack on my local machine. I have a Dockerfile which is identical to the official Wordpress image. My docker-compose file looks like this:

wordpress:
image: joystick/wp
ports:
- "8000:80"
links:
- wordpress_db:mysql
environment:
- WORDPRESS_DB_HOST=mysql
- WORDPRESS_DB_NAME=wordpress
- WORDPRESS_DB_USER=admin
- WORDPRESS_DB_PASSWORD=password
wordpress_db:
image: tutum/mysql
environment:
- ON_CREATE_DB=wordpress
- MYSQL_PASS=password

When I change the "image" part at the beginning of this to "wordpress" and use the official image, everything comes up as I'd expect. But when I try to build my own image first, and then use it in this docker-compose file, I get the error message "Container command could not be invoked".

I tried adding a "command" node into the "wordpress" section of this docker-compose, but that did not work.

If you're building from official images, e.g.

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, note the file `docker-entrypoint.sh`. It must be executable, I set 755 and managed to build the image and run the container.