Dockerizing the npmE service that installs, starts, stops the server.

This commit adds support for the Dockerfile that serves the dockerized
application found in the forked repo. In order to use this container,
use the README.md for instructions. This image is distributed on the
DockerHub portal at https://registry.hub.docker.com/u/marcellodesales/npme/

*	new file:   Dockerfile
- The dockerfile that builds the requirements defined in the npme/npme
  documentation on Github.

*	modified:   README.md
- Adding examples and documentation on how to run this using Docker.