Production React App Failing With 429 Error

Question

I have built a react app webpage, i use node, express and react. I serve it within an ec2 ubuntu server with nginx, i also installed ssl and configured DNS but when I load the page, the first time it gives no problems, but when reloaded, i get this Server responded with 429 status code

The page is very simple itself, but stills failing and i can't solve the problem, i have read a lot of posts and blogs to fix it but none has worked (this only happens in production, in dev environment i get no error when running my node app).

Some of those said that you had to lazy load images and i did it, i have also tried loading components in timeout so requests are made every 1.5 seconds...

The main files that give me problems are the manifest.json and favicon.ico, they are accesible by url so i can't understand why (another 429 example).

Node server.js

Routes has nothing, just console logs

require('dotenv').config();
const express = require("express");
const app = express();
const path = require("path");
const cors = require("cors");

const allowedOrigins = [`http://localhost:${process.env.PORT}`];

var corsOptions = {
  origin: function (origin, callback) {
    if (allowedOrigins.indexOf(origin) !== -1 || !origin) {
      callback(null, true)
    } else {
      callback(new Error('Not allowed by CORS'))
    }
  }
};

app.use(cors(corsOptions));

app.use(express.urlencoded({ extended: false }));
app.use(express.json());

app.use(express.static(path.join(__dirname, "/public")));

app.use("/", require("./routes/routes"));
app.get("*", (_, res) => res.redirect("/"))

app.listen(process.env.PORT, function () {
  console.log(`Listening on port ${process.env.PORT}`);
});

App directory structure

This is my folders structure, public folder is the build that react script npm run build returns.

React app directory structure

Here you can see the structure, nothing special to what you get when run npx create-react-app. As you can see, there's a favicon.ico and manifest.json.

Manifest.json

{
  "short_name": "Proximedica Bajío",
  "name": "Proximedica Bajío - Oxígeno Medicinal",
  "icons": [
    {
      "src": "favicon.ico",
      "sizes": "64x64 32x32 24x24 16x16",
      "type": "image/x-icon"
    },
    {
      "src": "logo192.png",
      "type": "image/png",
      "sizes": "192x192"
    },
    {
      "src": "logo512.png",
      "type": "image/png",
      "sizes": "512x512"
    }
  ],
  "start_url": ".",
  "display": "standalone",
  "theme_color": "#000000",
  "background_color": "#ffffff"
}

This is all, if you need me to provide some other file it would be a pleasure. Thanks!