Fixing gitpod configuration

[jfarid27]

Description

The gitpod configuration doesn't allow the application to fetch data from the chain due to CORs issues. This fixes this problem and adds a bit more information in the README.

Issues

• Fixes [Challenge 0] Gitpod Ports and CORS don't like hardhat chain requests from the application #41

Testing

1. Navigate to the gitpod branch and generate a new workspace. (Requires Github permissions to be accepted).
2. Once the workspace loads, you should see the environment tasks to install and setup the challenge start.
3. When the tasks are complete, a working instance of the application should start in the browser.