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/PageController.cs

@@ -0,0 +1,31 @@
+using Microsoft.AspNetCore.Mvc;
+using SkyArtShop.Models;
+using SkyArtShop.Services;
+
+namespace SkyArtShop.Controllers
+{
+    [Route("page")]
+    public class PageController : Controller
+    {
+        private readonly MongoDBService _mongoService;
+
+        public PageController(MongoDBService mongoService)
+        {
+            _mongoService = mongoService;
+        }
+
+        [HttpGet("{slug}")]
+        public async Task<IActionResult> Index(string slug)
+        {
+            var pages = await _mongoService.GetAllAsync<Page>("Pages");
+            var page = pages.FirstOrDefault(p => p.PageSlug == slug && p.IsActive);
+            
+            if (page == null)
+            {
+                return NotFound();
+            }
+
+            return View("View", page);
+        }
+    }
+}