Application should not hit external services on every page reload

[Timur Khafizov]

coingenius/app/controllers/coins_controller.rb

Line 18 in 8075d9f

 api_coins.each do |api_coin| 

[Kilim Choi]

what we currently have is a hack but the aim of it was to create any new coins from the api. Instead, we should have a worker that creates any new coins every day by hitting this endpoint.