MessageHandler = function MessageHandler(gladys, NodeTelegramBotApi, serviceId) {
  this.gladys = gladys;
  this.NodeTelegramBotApi = NodeTelegramBotApi;
  this.serviceId = serviceId;
  this.bot = null;
}
@description Add ability to send/receive telegram message.
@param {object} gladys - Gladys instance.
@param {object} NodeTelegramBotApi - Node telegram bot API.
@param {string} serviceId - UUID of the service in DB.
@example
const rtspCameraHandler = new RtspCameraHandler(gladys, ffmpeg, serviceId);