I have a website that makes POST requests to a discord webhook, and I am getting CORS errors. I do not get these errors when running the site on my local machine. Is there something I am missing in my security groups or networking setup? This is my first time really using AWS.

Edit 1: Here is the code:

function sendData(data){
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.open("POST", "https://discordapp.com/api/webhooks");
    xmlhttp.setRequestHeader("Content-Type", "application/json");
    xmlhttp.setRequestHeader("Access-Control-Allow-Origin", "*");
    xmlhttp.setRequestHeader("Access-Control-Allow-Methods","*");
    xmlhttp.send(JSON.stringify({content:String(data), username:"Name"}));
}