feat: upgrade index.html

cmd/http/views/index.hbs

@@ -62,7 +62,7 @@
             </div>
             <nav>
                 <ul>
-                    <li class="current"><a href="index.html">Home</a></li>
+                    <li class="current"><a href="/">Home</a></li>
                 </ul>
             </nav>
         </div>
@@ -85,6 +85,86 @@
             <li><strong>wallet_address:</strong> The wallet address to which the payment should be made.</li>
             <li><strong>expires_at:</strong> The time at which the order will expire.</li>
         </ul>
+
+         <h3>Examples</h3>
+        <h4>Go</h4>
+        <pre>
+            <code>
+                package main
+
+                import (
+                    "bytes"
+                    "encoding/json"
+                    "net/http"
+                )
+
+                type Order struct {
+                    OrderID     string  `json:"order_id"`
+                    ClientID    string  `json:"client_id"`
+                    Amount      float64 `json:"amount"`
+                    Currency    string  `json:"currency"`
+                    ClientEmail string  `json:"client_email"`
+                }
+
+                func main() {
+                    order := &Order{
+                        OrderID:     "123",
+                        ClientID:    "456",
+                        Amount:      100.0,
+                        Currency:    "USD",
+                        ClientEmail: "client@example.com",
+                    }
+
+                    jsonValue, _ := json.Marshal(order)
+                    _, err := http.Post("https://yourwebsite.com/order", "application/json", bytes.NewBuffer(jsonValue))
+                    if err != nil {
+                        // handle error
+                    }
+                }
+            </code>
+        </pre>
+
+        <h4>Node.js</h4>
+        <pre>
+            <code>
+                const axios = require('axios');
+
+                const order = {
+                    order_id: '123',
+                    client_id: '456',
+                    amount: 100.0,
+                    currency: 'USD',
+                    client_email: 'client@example.com'
+                };
+
+                axios.post('https://yourwebsite.com/order', order)
+                    .then(response => {
+                        console.log(response.data);
+                    })
+                    .catch(error => {
+                        console.error(error);
+                    });
+            </code>
+        </pre>
+
+        <h4>CURL</h4>
+        <pre>
+            <code>
+                curl -X POST https://yourwebsite.com/order \
+                -H 'Content-Type: application/json' \
+                -d '{
+                    "order_id": "123",
+                    "client_id": "456",
+                    "amount": 100.0,
+                    "currency": "USD",
+                    "client_email": "client@example.com"
+                }'
+            </code>
+        </pre>
+
+        <h3>Handling the Response</h3>
+        <p>The response from the /order endpoint is an HTML page that should be displayed to the user. This can be done by embedding the response in an iframe, loading it in a new browser window or tab, or by replacing the current page with the response HTML.</p>
+        <p>Please note that the exact method of displaying the response will depend on the specifics of your application and its user interface.</p>
     </div>
 </body>
 </html>