feat: implement user authentication and admin management

- Add user management API endpoints for listing and creating users.
- Implement login and logout functionality with rate limiting.
- Create UI components for login form, logout button, and animated elements.
- Add session management with JWT and secure cookie handling.
- Seed initial admin user if no users exist.
- Introduce utility functions for password hashing and user authentication.
- Set up proxy middleware for route protection and security headers.
- Create a JSON file for user data storage.
- Add links configuration for external resources.

frontend/next.config.ts

@@ -1,5 +1,17 @@
 import type { NextConfig } from "next";
 
+const securityHeaders = [
+  { key: "X-Frame-Options", value: "DENY" },
+  { key: "X-Content-Type-Options", value: "nosniff" },
+  { key: "Referrer-Policy", value: "strict-origin-when-cross-origin" },
+  { key: "Permissions-Policy", value: "camera=(), microphone=(), geolocation=()" },
+  { key: "X-DNS-Prefetch-Control", value: "off" },
+  {
+    key: "Strict-Transport-Security",
+    value: "max-age=63072000; includeSubDomains; preload",
+  },
+];
+
 const nextConfig: NextConfig = {
   output: "standalone",
   experimental: {
@@ -7,6 +19,14 @@ const nextConfig: NextConfig = {
       bodySizeLimit: "500mb",
     },
   },
+  async headers() {
+    return [
+      {
+        source: "/(.*)",
+        headers: securityHeaders,
+      },
+    ];
+  },
 };
 
 export default nextConfig;