Create an "echo" GraphQL server that can be used by provisioned dashboards to test obscure features

[retrodaredevil]

This issues serves to document the progress of creating an echo server that can be used for testing purposes.

Both #7 and #9 have changes that are difficult to test. It would be beneficial to have a GraphQL server that can have simple queries that can:

• Return the headers passed on the request
• Give you the variables sent to the server, or even just echo values of a variable

With these (and possibly more) features, we would be able to create a dashboard that has some expected results that can tell us if something has failed.