app.js

const express = require("express");
const bodyParser = require("body-parser");
const request = require("request");
const https = require("https");

const app = express();

app.use(express.static("public"));
app.use(bodyParser.urlencoded({extended: true}));

app.get("/", function (req, res) {
    res.sendFile(__dirname + "/signup.html"); 
});

app.post("/", function (req, res) {
    const firstName = req.body.fName 
    const lastName = req.body.lName 
    const email = req.body.email 

    const data = {
        members: [
            {
                email_address: email,
                status: "subscribed",
                merge_fields: {
                    FNAME: firstName,
                    LNAME: lastName,
                }
            }
        ]
    };

    const jsonData =  JSON.stringify(data);

    const url =  "https://us12.api.mailchimp.com/3.0/lists/a17b285582";

    const options = {
        method: "POST",
        auth: "saheed1:da068ee871bf37629c52cc3c2cf75a1d-us12"
    }
    
    const request = https.request(url, options, function(response) {
        if (response.statusCode === 200) {
            res.sendFile(__dirname + "/success.html");
        } else {
            res.sendFile(__dirname + "/failure.html");
        }

        response.on("data", function(data) {
            console.log(JSON.parse(data));
        })
    })

    // request.write(jsonData);
    request.end();

});

app.post("/failure", function(req, res) {
    res.redirect("/")
})

app.listen(process.env.PORT || 3000, function() {
    console.log("Server is running on port 3000.");
});