Feature/stand alone docker image

[slabajo]

What is the current behavior you want to change?

Provide a script that generates a local docker image for Kurento media server. This is useful for local testing and debugging.

What is the new behavior provided by this change?

No new behaviour

How has this been tested?

standard kurento tests

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature / enhancement (non-breaking change which improves the project)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• My change requires a change to the documentation
• My change requires a change in other repository

Checklist

• I have read the Contribution Guidelines
• I have added an explanation of what the changes do and why they should be included
• I have written new tests for the changes, as applicable, and have successfully run them locally