Please refer to full write up and instructions in the Web Component Widget README
Note that if you want to test out the app, then you don't need to run it locally. You can visit the deployed app here: https://widget-display.vercel.app/
To install this Widget Display repo locally you will need to have node installed on your computer.
git clone https://github.com/TylerWoolcott/widget-display.git
yarn install
yarn start
Open http://localhost:3000
in a browser.