The tunnel enables you to fetch, update ... data directly to the API.
The response from the API server will be stored in a "tunnel-latest.json" and "tunnel-latest-.json" response file.
By using the collections you can easily switch between tunneling or not.
$ node <nodeScript> collections tunnel
will activate the tunnel everwhere
$ node <nodeScript> collections tunnel-latest
will activate all latest tunnel responses
$ node <nodeScript> collections reset
set all responses to default