add donation information

Author: undergroundwires

.github/FUNDING.yml

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+github: undergroundwires
+ko_fi: undergroundwires
+custom: https://undergroundwires.dev/donate

README.md

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 # AWS in bullet points
 
 [![Quality checks status](https://github.com/undergroundwires/AWS-in-bullet-points/workflows/Quality%20checks/badge.svg)](https://github.com/undergroundwires/AWS-in-bullet-points/actions)
-[![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](https://github.com/undergroundwires/AWS-in-bullet-points/issues)
+[![GitHub sponsors](https://undergroundwires.dev/img/badges/donate/flat.svg)](https://undergroundwires.dev/donate?project=AWS-in-bullet-points)
 
 - This repo contains study notes for different AWS exams.
 - The notes are comprehensive and written with goal of covering all exam areas.
   - I passed the exam with 956/1000 score with these notes.
 - Good luck & enjoy studying! ☕
-- ✨ Contributions of any kind are welcome!
 
 ## Symbols
 
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 12. [Other services](./saa/12.%20Other%20services.md)
 13. [Well Architected Framework](./saa/13.%20Well%20Architected%20Framework.md)
 14. [Exam Readiness](./saa/14.%20Exam%20Readiness.md)
+
+## Support
+
+- ⭐️ Simplest way to say thanks is just to it a star 🤩
+- ❤️ To show more support:
+  - ☕️ [buy me a coffee](https://buymeacoffee.com/undergroundwire)
+  - 👏🏿 [sponsor me](https://github.com/sponsors/undergroundwires)
+  - 🎈 [donate using another way](https://undergroundwires.dev/donate)
+- ✨ Contributions of any kind are welcome!