feat: upgrade index information and readme

cmd/http/views/index.hbs

@@ -95,6 +95,7 @@
             <nav>
                 <ul>
                     <li class="current"><a href="/">Home</a></li>
+                    <li class=""><a href="https://gitea.urkob.com/urko/btc-pay-checker">Source code</a></li>
                 </ul>
             </nav>
         </div>
@@ -195,6 +196,27 @@
         <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>
+
+
+    <h3>Rate Limiting</h3>
+    <p>To protect the service from potential denial-of-service (DoS) attacks, we have implemented rate limiting on our
+        server. This is done using a middleware in the Fiber framework.</p>
+    <p>The current configuration allows a maximum of 5 requests per client within a 30-minute window. If a client
+        exceeds this limit, further requests will be temporarily blocked until the rate falls below the limit.</p>
+    <p>This is achieved with the following configuration:</p>
+
+    <pre>
+    <code>
+        s.app.Use(limiter.New(limiter.Config{
+            Max:               5,
+            Expiration:        30 * time.Minute,
+            LimiterMiddleware: limiter.SlidingWindow{},
+        }))
+    </code>
+</pre>
+
+    <p>Please be aware of this limit when integrating with our API to ensure a smooth user experience.</p>
+
 </body>
 
 </html>