Provide a way to write you full docker command parameters in plain text

[Angel Ruiz]

I have tried using a Shell script task and it did not work. I have pending to investigate the issue further. But regardless and given the context where these tasks are created by people who know how to use Docker, IMO this should be the default behavior, instead of trying to dumb down each command by adding way too many input fields. The trend in CI engines is to apply the configuration as code paradigm, so by using a shell script I should be able to decouple my build from the CI engine I'm using