Added backend and refactored frond-end to support it.

* Removed unecesery home page
* Added PHP Api that provides auth and replaces the json-server for data storage
* Added support for alternate geocode-api
* Added registration  page

api/calls/get_items.php

@@ -0,0 +1,17 @@
+<?php
+session_start();
+if (!isset($_SESSION['name'])) {
+    http_response_code(401);
+    echo json_encode(['message' => 'Unauthorized']);
+    die;
+}
+
+require_once 'config/db.php';
+
+$query = "SELECT * FROM items";
+$stmt = $pdo->prepare($query);
+$stmt->execute();
+
+$items = $stmt->fetchAll(PDO::FETCH_ASSOC);
+
+echo json_encode($items);