The Docker image for Lita is intended for deploying a Lita code repository. Depending on what you're trying to do, using the Docker image may not be the right choice. The image is documented in the README at
https://github.com/litaio/docker-lita, with more detailed deployment instructions at
https://docs.lita.io/getting-started/deployment/. If you can provide some more specific information about what you're trying to achieve and what command you're running to do it, I can offer more specific suggestions.