Docker Image

Is there a Docker image available for this repo on an image repository? Using this for integration testing our SAML functionality and would be nice if I could just pull in a reliable image for use with docker-compose.

I found a few in Docker Hub (https://hub.docker.com/search?q=saml-idp&type=image), but they appear to come from forks so I'm unsure if they are up to date or are safe to use.

[mcguinness]

I haven't maintained a docker image yet, there is a compose file in the repo to build your own. Just haven't had the time for establish a repeatable build, test, publish flow.

@mcguinness Took a stab at setting that up in #54 , would appreciate feedback.