Здравейте!

Изтеглих си скелета от github за упражнението Architecture & Code Styling от курса ExpressJS Fundamentals - септември 2017. Инсталирах всички dependencies, но не мога да си стартирам сървъра. когато се опитам да го направя ми хвърля следната грешка в конзолата:

MongoError: failed to connect to server [localhost:27017] on first connect [MongoError: connect ECONNREFUSED 127.0.0.
1:27017]
    at Pool.<anonymous> (C:\Users\Yamukova2014\WebstormProjects\ExpressJS-may2017\express-demo-server-master\node_modul
es\mongodb-core\lib\topologies\server.js:336:35)
    at emitOne (events.js:115:13)
    at Pool.emit (events.js:210:7)
    at Connection.<anonymous> (C:\Users\Yamukova2014\WebstormProjects\ExpressJS-may2017\express-demo-server-master\node
_modules\mongodb-core\lib\connection\pool.js:280:12)
    at Object.onceWrapper (events.js:318:30)
    at emitTwo (events.js:125:13)
    at Connection.emit (events.js:213:7)
    at Socket.<anonymous> (C:\Users\Yamukova2014\WebstormProjects\ExpressJS-may2017\express-demo-server-master\node_mod
ules\mongodb-core\lib\connection\connection.js:187:49)
    at Object.onceWrapper (events.js:316:30)
    at emitOne (events.js:115:13)
    at Socket.emit (events.js:210:7)
    at emitErrorNT (internal/streams/destroy.js:64:8)
    at _combinedTickCallback (internal/process/next_tick.js:138:11)
    at process._tickCallback (internal/process/next_tick.js:180:9)
  name: 'MongoError',
  message: 'failed to connect to server [localhost:27017] on first connect [MongoError: conne
27017]' }
(node:748) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): M
ct to server [localhost:27017] on first connect [MongoError: connect ECONNREFUSED 127.0.0.1:2
(node:748) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the
 that are not handled will terminate the Node.js process with a non-zero exit code.

Честно казано не ми говори много тази грешка, а и досега не ми се е случвало и не се досещам какво мога да направя.