feat: set up embedded static server

Signed-off-by: Sphericalkat <amolele@gmail.com>

frontend/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link rel="stylesheet" href="src/index.css">
+    <title>{{ .Title }}</title>
+</head>
+<body>
+    <h1 class="text-2xl">Hello, World!</h1>
+</body>
+</html>