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

Views/AdminProducts/Index.cshtml

@@ -0,0 +1,109 @@
+@model List<Product>
+@{
+    ViewData["Title"] = "Manage Products";
+    Layout = "_AdminLayout";
+}
+
+<div class="d-flex justify-content-between align-items-center mb-3">
+    <h5 class="mb-0">All Products (@Model.Count)</h5>
+    <a href="/admin/products/create" class="btn btn-primary">
+        <i class="bi bi-plus-circle"></i> Add New Product
+    </a>
+</div>
+
+<div class="card">
+    <div class="card-body">
+        @if (Model.Any())
+        {
+            <div class="table-responsive">
+                <table class="table table-hover">
+                    <thead>
+                        <tr>
+                            <th>Image</th>
+                            <th>Name</th>
+                            <th>Category</th>
+                            <th>Price</th>
+                            <th>Stock</th>
+                            <th>Status</th>
+                            <th>Actions</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        @foreach (var product in Model.OrderByDescending(p => p.CreatedAt))
+                        {
+                            <tr>
+                                <td>
+                                    @if (!string.IsNullOrEmpty(product.ImageUrl))
+                                    {
+                                        <img src="@product.ImageUrl" alt="@product.Name" style="width: 50px; height: 50px; object-fit: cover; border-radius: 4px;">
+                                    }
+                                    else
+                                    {
+                                        <div style="width: 50px; height: 50px; background: #e0e0e0; border-radius: 4px;"></div>
+                                    }
+                                </td>
+                                <td>
+                                    <strong>@product.Name</strong>
+                                    @if (product.IsFeatured)
+                                    {
+                                        <span class="badge bg-warning text-dark ms-1">Featured</span>
+                                    }
+                                    @if (product.IsTopSeller)
+                                    {
+                                        <span class="badge bg-success ms-1">Top Seller</span>
+                                    }
+                                </td>
+                                <td>@product.Category</td>
+                                <td>$@product.Price.ToString("F2")</td>
+                                <td>@product.StockQuantity</td>
+                                <td>
+                                    @if (product.IsActive)
+                                    {
+                                        <span class="badge bg-success"><i class="bi bi-check-circle-fill"></i> Active</span>
+                                    }
+                                    else
+                                    {
+                                        <span class="badge bg-danger"><i class="bi bi-x-circle-fill"></i> Inactive</span>
+                                    }
+                                </td>
+                                <td>
+                                    <div class="btn-group btn-group-sm">
+                                        <a href="/admin/products/edit/@product.Id" class="btn btn-outline-primary">
+                                            <i class="bi bi-pencil"></i>
+                                        </a>
+                                        <button onclick="deleteProduct('@product.Id', '@product.Name')" class="btn btn-outline-danger">
+                                            <i class="bi bi-trash"></i>
+                                        </button>
+                                    </div>
+                                </td>
+                            </tr>
+                        }
+                    </tbody>
+                </table>
+            </div>
+        }
+        else
+        {
+            <p class="text-center text-muted my-5">No products found. Create your first product!</p>
+        }
+    </div>
+</div>
+
+@section Scripts {
+    <script>
+        function deleteProduct(id, name) {
+            if (confirm(`Are you sure you want to delete "${name}"?`)) {
+                fetch(`/admin/products/delete/${id}`, {
+                    method: 'POST'
+                })
+                .then(response => {
+                    if (response.ok) {
+                        location.reload();
+                    } else {
+                        alert('Error deleting product');
+                    }
+                });
+            }
+        }
+    </script>
+}