This contains partial code for the front- and back-end of a crypto portfolio tracker web application that can be viewed here. For a more complete front-end code sample, please take a look at the stand-alone code for the main page, which is currently live at https://atcsportal.com. Likewise, for a more complete back-end code sample, take a look at this sample application hosted on Glitch.com. The complete code for the Glitch demo can be found at this GitHub repo.