Add Donate Button (#26)

* Add donate button

* Add donate button

* Switch to HTML and resize image

Author: cybcon

README.md

@@ -171,6 +171,11 @@ services:
       - ./server.json:/server_config.json:ro
 ```
 
+# Donate
+I would appreciate a small donation to support the further development of my open source projects.
+
+<a href="https://www.paypal.com/donate/?hosted_button_id=BHGJGGUS6RH44" target="_blank"><img src="https://raw.githubusercontent.com/stefan-niedermann/paypal-donate-button/master/paypal-donate-button.png" alt="Donate with PayPal" width="200px"></a>
+
 
 # License