Add initial implementation of database and HTML loader classes

public/main.php

@@ -0,0 +1,25 @@
+<?php
+class gb {
+    function __construct() {
+        // Define Paths
+        define("APP_PATH", __DIR__ . "/..");
+        define("FRONTEND_PATH", __DIR__ . "/");
+        define("TEMPLATE_PATH", FRONTEND_PATH . "templates/");
+        define("TEMPLATE_CONF", TEMPLATE_PATH . "templates.json");
+        
+        // Check Database and show setup if database not exists
+        if (!file_exists(APP_PATH . "database.db")) {
+            $this->initSetup();
+        }
+    }
+
+    function initSetup() {
+        // Load and init the HTML Loader
+        require "html_loader.php";
+        $html = new HTMLLoader();
+
+        // Set template to Setup an show it
+        $html->setTemplate("setup");
+        $html->show();
+    }
+}