message: Fixed wrong reference to "this" in the server close function
diff: @@ -275,8 +275,8 @@ exports.start = async function (readyCallback) {
  }
  exports.close = function (exitCode) {
  - if (this.server) {
  - this.server.close(exitCode)
  + if (server) {
  + server.close(exitCode)
  } else {
  process.exit(exitCode)
  }
  