Add Docker folder and Dockerfile for Laika BOSS

[wzod]

Submitting pull request for Docker support including creation of new folder for Dockerfile. Pull request provides the following enhancements:

• current version of YARA
• ability to run standalone and/or network instance
• helpful ENTRYPOINT explaining how to use Laika BOSS

[azollman]

Zod - Happy to merge this in. Although it may be understood, could you add an Apache 2.0 header to the Dockerfile just for the sake of clarity? Much appreciated posting the image to Docker Hub, as well!

Thanks!

[wzod]

Done.