DynamoDB-local in CodeBuild ReadTimeout Error

I'm trying to run integration tests with the dynamodb-local docker container with CodeBuild my CodePipeline. I'm able to build the container and docker ps shows the container is running. I can run my unit tests that don't use the container. If I curl https://localhost:8000 I'm getting the MissingAuthenticationToken response that is expected. But when I try to create a table in my test fixtures or try aws dynamodb list-tables --endpoint-url http://localhost:8000 I'm getting a ReadTimeout Error.