docs: function nextPort(port) {
    if (!port) {
      return 8000;
    }
  
    //
    // Find the next port that we are not supposed to ignore or cause errors on
    //
    var unavailable = carapace.ports.ignore.concat(carapace.ports.throw);
    do {
      port = port + 1;
    } while (unavailable.indexOf(port) !== -1);
  
    return port;
  }