added index.js file

index.js

@@ -0,0 +1,25 @@
+const express = require("express");
+const mongoose = require("mongoose");
+require("dotenv").config();
+
+const app = express();
+const authRoute = require("./routes/auth");
+const shopItemsRoute = require("./routes/shopItems");
+
+const connect = mongoose.connect(process.env.mongoDB_URL);
+
+connect.then(() => {
+  console.log("Connected sucessfully to my database");
+}).catch((error) => {
+  console.log("Could not connect to the database, reason =", error);
+});
+
+app.use(express.json());
+app.use(express.urlencoded({extended: false}));
+
+app.use('/v1/shop-items', shopItemsRoute);
+app.use('/v1/auth', authRoute);
+
+app.listen(4000, () => {
+    console.log("Listening on port 4000...");
+});