Renamed backend into auth_backend and added server_browser_backend implementation to replace Supabase.

auth_backend/structure/storefront.js

@@ -0,0 +1,23 @@
+const Express = require("express");
+const express = Express.Router();
+const functions = require("./functions.js");
+const catalog = functions.getItemShop();
+const keychain = require("./../responses/keychain.json");
+
+express.get("/fortnite/api/storefront/v2/catalog", async (req, res) => {
+    if (req.headers["user-agent"].includes("2870186")) {
+        return res.status(404).end();
+    }
+
+    res.json(catalog);
+})
+
+express.get("/fortnite/api/storefront/v2/keychain", async (req, res) => {
+    res.json(keychain)
+})
+
+express.get("/catalog/api/shared/bulk/offers", async (req, res) => {
+    res.json({});
+})
+
+module.exports = express;