example using a gizmo/server.MixedService with a gizmo/server.SimpleServer.
one endpoint will serve JSON of the most popular NYT articles and another will serve an HTML page listing recent articles in The New York Times about 'cats'.
this example is very similar to the simple example, but makes use of the available JSONMiddleware method in a gizmo/server.MixedService.
The config in this example is loaded via a local JSON file and a custom config struct that is composed of a gizmo/config.Server struct.