[FEATURE] Create /info endpoint to return middleware component info

[jeffreyaven]

Feature Description
create an /info endpoint GET route on the middleware server to return an application/json response as follows:

{
  "middlewareServer" : {
     "serverVersion": "v0.1.0",
     "commitSha": "abcdef..."
  }
  "stackQL":  {
     "serverVersion": "v2.0.0",
     "commitSha": "abcdef..."
  }
}