Update README.md with docker description and badge

Author: markatk

README.md

@@ -1,6 +1,7 @@
 # AlternateLife.RageMP.Net
-![Build status](https://teamcity.alternate-life.de/app/rest/builds/buildType:(id:RageMP_NETCore_Release)/statusIcon) (Windows)
-![Build status](https://teamcity.alternate-life.de/app/rest/builds/buildType:(id:RageMP_NETCore_Linux_Release)/statusIcon) (Linux)
+![Windows build status](https://teamcity.alternate-life.de/app/rest/builds/buildType:(id:RageMP_NETCore_Release)/statusIcon) (Windows)
+![Linux build status](https://teamcity.alternate-life.de/app/rest/builds/buildType:(id:RageMP_NETCore_Linux_Release)/statusIcon) (Linux)
+[![Docker build status](https://teamcity.alternate-life.de/app/rest/builds/buildType:(id:RageMP_NETCore_Linux_Docker_Release)/statusIcon)](https://cloud.docker.com/repository/docker/alternatelife/ragemp-server) (Docker)
 [![NuGet](https://img.shields.io/nuget/dt/AlternateLife.RageMP.Net.svg)](https://www.nuget.org/packages/AlternateLife.RageMP.Net)
 
 AlternateLife.RageMP.Net is an alternative server-side .NET Core 2.2 implementation for [RAGE Multiplayer](https://rage.mp). This library targets more advanced developers which are more familiar with the RAGE Multiplayer server API and its features. It offers a mostly asynchronous API to interact with, so a thread-safe access to the native API is always guaranteed.
@@ -81,6 +82,10 @@ namespace AlternateLife.RageMP.Net.Example
 }
 ```
 
+## Docker
+
+Hosten on [DockerHub](https://cloud.docker.com/repository/docker/alternatelife/ragemp-server) is an image containing the Rage-MP linux server with this bridge installed.
+
 ## See also
 
 - This package heavily relies on our [RAGE Multiplayer C SDK wrapper](https://github.com/AlternateLife/ragemp-c-sdk).