message: use proper Numbers
diff: @@ -71,8 +71,8 @@ const rabbitmqHost = process.env.RABBITMQ_HOST || 'broker';
  const rabbitmqUsername = process.env.RABBITMQ_USERNAME || 'guest';
  const rabbitmqPassword = process.env.RABBITMQ_PASSWORD || 'guest';
  -const taskPrefetch = process.env.TASK_PREFETCH_COUNT || 2;
  -const taskMonitorPrefetch = process.env.TASKMONITOR_PREFETCH_COUNT || 1;
  +const taskPrefetch = process.env.TASK_PREFETCH_COUNT ? Number(process.env.TASK_PREFETCH_COUNT) : 2;
  +const taskMonitorPrefetch = process.env.TASKMONITOR_PREFETCH_COUNT ? Number(process.env.TASKMONITOR_PREFETCH_COUNT) : 1;
  class UnknownActiveSystem extends Error {
  constructor(message) {
  