Update README.md

Author: GregorBiswanger

README.md

@@ -1,5 +1,7 @@
 [![Electron.NET Logo](https://github.com/ElectronNET/Electron.NET/blob/master/assets/images/electron.net-logo.png)](https://github.com/ElectronNET/Electron.NET)
 
+[![donate](https://img.shields.io/badge/Donate-Donorbox-green.svg)](https://donorbox.org/electron-net)
+
 
 AppVeyor (Win/Linux): [![Build status](https://ci.appveyor.com/api/projects/status/q95h4xt14papwi05/branch/master?svg=true)](https://ci.appveyor.com/project/robertmuehsig/electron-net/branch/master)
 
@@ -143,7 +145,7 @@ Those three "default" targets will produce x64 packages for those platforms.
 For certain NuGet packages or certain scenarios you may want to build a pure x86 application. To support those things you can define the desired [.NET Core runtime](https://docs.microsoft.com/en-us/dotnet/core/rid-catalog), the [electron platform](https://github.com/electron-userland/electron-packager/blob/master/docs/api.md#platform) and [electron architecture](https://github.com/electron-userland/electron-packager/blob/master/docs/api.md#arch) like this:
 
 ```
-    electronize build build /target custom win7-x86;win32 /electron-arch ia32 
+    electronize build /target custom win7-x86;win32 /electron-arch ia32 
 ```
 
 The end result should be an electron app under your __/bin/desktop__ folder.
@@ -173,7 +175,11 @@ Please make sure all commits are properly documented.
 * **Robert Muehsig** - Software Developer - from Dresden, Germany, now living & working in Switzerland. Microsoft MVP & Web Geek. - [codeinside Blog](https://blog.codeinside.eu) - Twitter [@robert0muehsig](https://twitter.com/robert0muehsig)  
 
 See also the list of [contributors](https://github.com/ElectronNET/Electron.NET/graphs/contributors) who participated in this project.
-  
+
+## Donate
+
+We do this open source work in our free time. If you'd like us to invest more time on it, please [donate](https://donorbox.org/electron-net). Donation can be used to increase some issue priority.
+
 # License
 MIT-licensed