[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..."
 }
}