#167891584 Notifications for new travel request(in-app notification)

[Pomile]

What does this PR do?

Send in-app message to the admin user.

Description of Task to be completed?

• Install socket.io and sockect.io-client
• Create an in-app client
• Create socket io server
• Modify new trip request method
• create html page to test this feature

How should this be manually tested?

Unit test

1. Clone the project repository
2. Cd into the project repository
3. Run git pull
4. Run git checkout ft-inAppNotification-configOpt-endpoint-167891584
5. Run npm install
6. Create database database_name
7. Create .env file
8. Run npm test

Development test with Postman

1. Run npm run devstart
2. launch your browser and enter /api/v1/trips/test/in_app
3. Launch postman
4. Create a new post request with /api/v1/trips
5. Add a request body

{

    "type": "oneway",
    "from": "xxxxxxxxxxxxxxxxx",
    "departureDate": "2000-09-09",
    "reason": "Just wanna travel",
    "destination":
    {
      "to": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "accomodation": "xxxxxxxxxxxxxxxxxxxxxxxxxxxx"
    }
  } 

5. Add authorization(token) in the request header.
6. Hit send

What are the relevant pivotal tracker stories?

#167891584

Any background context you want to add?

Nil

Screenshots

[tvpeter]

lines 52, 57 & 66 have conflict you are yet to resolve.