docs(): add buymeacoffe =)

README.md

@@ -2,7 +2,9 @@
 
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/MatteoGioioso/serverless-pg)
 [![npm version](https://badge.fury.io/js/serverless-postgres.svg)](https://badge.fury.io/js/serverless-postgres)
-![GitHub](https://img.shields.io/github/license/MatteoGioioso/serverless-pg)
+![GitHub](https://img.shields.io/github/license/MatteoGioioso/serverless-pg) \
+[!["Buy Me A Coffee"](https://www.buymeacoffee.com/assets/img/custom_images/orange_img.png)](https://www.buymeacoffee.com/matteogioioso)
+
 
 Serverless-postgres is a wrapper for **[node-pg](https://github.com/brianc/node-postgres)** Node.js module.
 It is heavily inspired by Jeremy Daly's **[serverless-mysql](https://github.com/jeremydaly/serverless-mysql)** package.