Add funding

.github/FUNDING.yml

@@ -0,0 +1,14 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
+  - https://www.paypal.com/donate/?hosted_button_id=BHGJGGUS6RH44

README.md

@@ -94,6 +94,12 @@ register
 10002       1   True
 ```
 
+# 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
 
 Copyright (c) 2020-2023 Michael Oberdorf IT-Consulting