You can see the live version located at: https://arcane-bastion-98590.herokuapp.com/
You will need to run app.js with node
The newsletter sends the user information to mailchimp using their api. To use this system you will need to change the url variable and auth inside the options object:
const url = `https://us17.api.mailchimp.com/3.0/lists/YOURLISTID`;
const options = {
method: "POST",
auth: "austin:YOURAPIKEY",
};