Deployment Docker

Create a docker file to:

1. Pull in the latest LTS minor revision of Vanilla Forums. The best example of format and process would possibly be https://github.com/topcoder-platform/av-scanner-service but don't be limited to this
2. Set up a plugin structure for vanilla in this repo: https://github.com/topcoder-platform/forums-plugins This should be pulled in, installed and configured by docker (for now, cloning it into the plugins directory is fine)

Final Submission Guidelines

Git issue link: https://github.com/topcoder-platform/forums/issues/1