feat: update readme

README.md

@@ -15,7 +15,7 @@ Created by [iam1337](https://github.com/iam1337)
 - [Author Contacts](#author-contacts)
 
 ## Introduction
-extApi - ...
+extApi - It is a simple Http Server, which requires a minimum of specific code to work with. 
 
 ### Features:
 
@@ -48,7 +48,32 @@ Or if you don't have it, add the scoped registry to manifest.json with the desir
 ```
 
 ## Examples
-...
+
+To make a simple Web Api, the following lines are enough:
+```csharp
+// Create Api Server
+_api = new Api();
+_api.AddController(new ApiController()); // <--- Add controller
+_api.Listen(8080, IPAddress.Any, IPAddress.Loopback);
+
+// Simple controller example
+[ApiRoute("api")]
+public class ApiController
+{
+        [ApiGet("vector/{x}/{y}/{z}")] // GET /api/vector/1/2.5/5
+	public ApiResult GetVector(float x, float y, float z)
+        {
+		return ApiResult.Ok(new Vector3(x, y, z));
+        }
+
+
+        [ApiPost("vector")] // POST /api/vector { "x": 1.0, "y": 2.5, "z": 5.0 }
+	public ApiResult GetVector([ApiBody] Vector vector)
+        {
+		// TODO: ...
+        }
+}
+```
 
 ## Author Contacts
 \> [telegram.me/iam1337](http://telegram.me/iam1337) <br>