- add: frontend webpage for login/register

frontend/nginx.conf.example

@@ -0,0 +1,23 @@
+server {
+    listen 80;
+    listen  [::]:80;
+    server_name localhost;
+
+    # Root directory for the built React app
+    root /usr/share/nginx/html;
+
+    # Serve index.html for all routes
+    location / {
+        try_files $uri /index.html;
+    }
+
+    # Serve static files directly
+    location ~* \.(?:ico|css|js|gif|jpg|jpeg|png|svg|woff2?|eot|ttf|otf)$ {
+        expires max;
+        add_header Cache-Control "public";
+    }
+
+    # Optional: Log errors
+    error_log /var/log/nginx/error.log warn;
+    access_log /var/log/nginx/access.log;
+}