Deleted useless files such as backend, node_modules and package-lock. Modified readme.

Backend/Database/DB_connect.js

@@ -1,21 +0,0 @@
-const mongoose = require("mongoose");
-const catchAsyncErrors = require("../Middlewares/catchAsyncErrors.js");
-
-const DB_connect = catchAsyncErrors(async () => {
-  try {
-    const connectionInstance = await mongoose.connect(
-      `${process.env.MONGODB_URI}/${process.env.DATABASE_NAME}`
-    );
-
-    if (!connectionInstance) {
-      console.log("MongoDB connection failed");
-    }
-    console.log(
-      "MongoDB connected Successfully on server : " +
-        connectionInstance.connection.host
-    );
-  } catch (error) {
-    console.log("MongoDB connection failed due to some error :", error);
-  }
-});
-module.exports = DB_connect;