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

Controllers/PageController.cs

@@ -0,0 +1,29 @@
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using SkyArtShop.Models;
+using SkyArtShop.Services;
+
+namespace SkyArtShop.Controllers;
+
+[Route("page")]
+public class PageController : Controller
+{
+	private readonly PostgreSQLService _pgService;
+
+	public PageController(PostgreSQLService pgService)
+	{
+		_pgService = pgService;
+	}
+
+	[HttpGet("{slug}")]
+	public async Task<IActionResult> Index(string slug)
+	{
+		Page page = (await _pgService.GetAllAsync<Page>("Pages")).FirstOrDefault((Page p) => p.PageSlug == slug && p.IsActive);
+		if (page == null)
+		{
+			return NotFound();
+		}
+		return View("View", page);
+	}
+}