docs: update README.md

Author: phnx47

README.md

@@ -7,19 +7,18 @@
 [![License MIT](https://img.shields.io/badge/license-MIT-green.svg)](https://opensource.org/licenses/MIT)
 
 
-
 Extension for [Prometheus.Client](https://github.com/PrometheusClientNet/Prometheus.Client)
 
 
 #### Installation:
-
-     dotnet add package Prometheus.Client.AspNetCore
-
+```sh
+dotnet add package Prometheus.Client.AspNetCore
+```
 #### Quik start:
 
 There are [Examples](https://github.com/PrometheusClientNet/Prometheus.Client.Examples/tree/master/Middleware/WebAspNetCore_2.0)
 
-```csharp
+```c#
 
 public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IApplicationLifetime appLifetime)
 {
@@ -28,7 +27,7 @@ public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerF
 
 ```
 
-```csharp
+```c#
 
 public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IApplicationLifetime appLifetime)
 {
@@ -39,5 +38,23 @@ public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerF
 }
 
 ```
+## Contribute
+
+Contributions to the package are always welcome!
+
+* Report any bugs or issues you find on the [issue tracker](https://github.com/PrometheusClientNet/Prometheus.Client.AspNetCore/issues).
+* You can grab the source code at the package's [git repository](https://github.com/PrometheusClientNet/Prometheus.Client.AspNetCore).
+
+## Support
+
+I would also very much appreciate your support:
+
+<a href="https://www.buymeacoffee.com/phnx47"><img width="32px" src="https://raw.githubusercontent.com/phnx47/files/master/button-sponsors/bmac0.png" alt="Buy Me A Coffee"></a>
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+
+
+## License
 
+All contents of this package are licensed under the [MIT license](https://opensource.org/licenses/MIT).