Automate the creation of the Docker image in Docker Hub.

[dmabtrg]

The FIWARE Docker guidelines says:

A GEi's Docker MUST be published at least under the 'fiware' account on DockerHub (if possible, please avoid the term 'fiware' in your repository name, as the username already contains it). The GEi owner will be responsible for publication and maintenance operations. The publication method will be through the 'Automatic Build Procedure' which allows to link a Github repository to a Dockerhub one (and keep them in sync). In order to get access to that account and proceed with the publication, please get in touch with José Manuel Cantera.

(emphasis mine).

After the latest changes made to the Dockerfile, I think that the image can be automated in Docker Hub. Once this is automated, you can also add tags for the releases.

Thanks.

[urishani]

Looking forward to learn how to install the automatic build.