[Tech] [Ajay]: Update index.html with latest changes

Author: Ajay kumar

TestArena/wwwroot/index.html

@@ -13,8 +13,18 @@
     </script>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Dev Codex</title>
+    <title>Dev Codex: Your Ultimate Guide to .NET Development, Testing, and Security</title>
+    <meta name="description" content="Dev Codex: Your ultimate resource for .NET development, AI integration, clean coding, performance testing, and modern software practices. Learn how to build secure, efficient, and scalable applications with expert insights and tutorials." />
+    <meta name="keywords" content=".NET development, AI in software, clean coding, performance testing, software practices, secure applications, modern development" />
+    <meta name="author" content="Ajay Kumar" />
+    <meta property="og:title" content="Dev Codex: Your Ultimate Guide to .NET Development, AI, and Software Practices" />
+    <meta property="og:description" content="Explore expert insights on .NET development, AI integration, clean coding, performance testing, and modern software practices. Build better, smarter, and faster applications with Dev Codex." />
+    <meta property="og:url" content="https://devcodex.in/" />
+    <meta property="og:type" content="website" />
+    <meta property="og:image" content="https://devcodex.in/images/og-image.png" />
+    <meta property="og:locale" content="en_US" />
     <base href="/" />
+    <link rel="canonical" href="https://devcodex.in/" />
     <link rel="stylesheet" href="css/bootstrap/bootstrap.min.css" />
     <link rel="stylesheet" href="css/app.css" />
     <link href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-icons/1.5.0/font/bootstrap-icons.min.css"