Node challenge difficulty

Tell us what’s happening:
I can’t figure this challenge out. Might be easy but I don’t fully understand serving json objects yet.

Your code so far
var express = require(‘express’);
var app = express();
app.get("/", function(req,res){
res.sendFile(absolutePath = __dirname + “/views/index.html”);
app.use(express.static(__dirname + “/public”));

//Challenge starts here
app.get("/json", function(req,res){
if(process.env.MESSAGE_STYLE === “uppercase”) {
res.json({message:“HELLO JSON”});
} else {
res.json({message:“Hello json”});

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36.

Use the .env file
Link to the challenge: