Fix admin route access and backend configuration

- Added /admin redirect to login page in nginx config
- Fixed backend server.js route ordering for proper admin handling
- Updated authentication middleware and routes
- Added user management routes
- Configured PostgreSQL integration
- Updated environment configuration

Sky_Art_shop/Controllers/ContactController.cs

@@ -0,0 +1,34 @@
+using Microsoft.AspNetCore.Mvc;
+using SkyArtShop.Models;
+using SkyArtShop.Services;
+
+namespace SkyArtShop.Controllers
+{
+    public class ContactController : Controller
+    {
+        private readonly MongoDBService _mongoService;
+        private readonly string _settingsCollection = "SiteSettings";
+
+        public ContactController(MongoDBService mongoService)
+        {
+            _mongoService = mongoService;
+        }
+
+        public async Task<IActionResult> Index()
+        {
+            var settingsList = await _mongoService.GetAllAsync<SiteSettings>(_settingsCollection);
+            var settings = settingsList.FirstOrDefault() ?? new SiteSettings();
+            
+            return View(settings);
+        }
+
+        [HttpPost]
+        public IActionResult Submit(string name, string email, string phone, string subject, string message)
+        {
+            // Here you would implement email sending logic
+            // For now, just return a success message
+            TempData["Success"] = "Thank you! Your message has been sent. We'll get back to you soon.";
+            return RedirectToAction("Index");
+        }
+    }
+}