solve access to /login

Vite won't export not specified page, so I specified it in the config.

frontend/login/index.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+	<head>
+		<meta charset="utf-8">
+		<title>Clyde - Login</title>
+	</head>
+	<body>
+		<div id="app"></div>
+		<script type=module src="/src/login.js"></script>
+	</body>
+</html>