docker container for running an Galaxy Tool Generator application

Hi @jmchilton , here is the [link](https://github.com/MingChen0919/gtgdocker) to the docker container for running an Galaxy Tool Generator application. We talked about this during today's GCC poster/demo session. It would be great if you could take a look and give me some advice about how to use planemo to test the tools instead of using testing with a running galaxy instance. Thanks a lot!

And here are the two drupal module repos for the application:
* https://github.com/MingChen0919/galaxy_tool_generator_ui
* https://github.com/MingChen0919/galaxy_tool_generator

Start by reviewing the linked Docker container and the galaxy_tool_generator_ui and galaxy_tool_generator repositories, then examine how planemo could test the tools without a running Galaxy instance. Confirm the intended integration and testing workflow with the issue author; done would require an agreed, reproducible approach.

Written by the indexing model from the issue text.