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/Views/Contact/Index.cshtml

@@ -0,0 +1,37 @@
+@{
+    ViewData["Title"] = "Contact";
+}
+
+<section class="portfolio-hero">
+    <div class="container">
+        <h1>Contact Us</h1>
+        <p class="hero-subtitle">Get in touch with Sky Art Shop</p>
+    </div>
+</section>
+
+<section class="shop-products">
+    <div class="container">
+        <div class="contact-form-wrapper">
+            <partial name="_AdminAlerts" />
+            
+            <form method="post" action="/contact/submit" class="contact-form">
+                <div class="form-group">
+                    <label for="name">Name</label>
+                    <input type="text" id="name" name="name" class="form-control" required />
+                </div>
+                
+                <div class="form-group">
+                    <label for="email">Email</label>
+                    <input type="email" id="email" name="email" class="form-control" required />
+                </div>
+                
+                <div class="form-group">
+                    <label for="message">Message</label>
+                    <textarea id="message" name="message" class="form-control" rows="6" required></textarea>
+                </div>
+                
+                <button type="submit" class="btn btn-primary">Send Message</button>
+            </form>
+        </div>
+    </div>
+</section>