Using Nodejs and Mongodb

• Fetch.js : Implement a background job that will fetch the current price in USD, market cap in USD and 24 hour change of 3 cryptocurrencies: Bitcoin, Matic, and Ethereum and store it in a database. This job should run once every 2 hours.

• Latest_data.js: Implement an API /stats, that will return the latest data about the requested cryptocurrency.

• Query params:
  {
  coin: bitcoin // Could be one of the above 3 coins
  }

• Deviation.js: Implement an API, /deviation, that will return the standard deviation of the price of the requested cryptocurrency for the last 100 records stored by the background service in the database.

• For example, consider the database only has 3 records for bitcoin, each with a price of 40000, 45000, 50000 respectively. Then the result should return 4082.48.

• Query params:
  {
  coin: bitcoin // Could be one of the above 3 coins
  }