Update README.md

Author: derogab

README.md

@@ -57,5 +57,11 @@ docker-compose -f docker-compose.dev.yml up -d
 docker-compose -f docker-compose.build.yml up -d --build
 ```
 
+### Tip
+If you like this project or directly benefit from it, please consider buying me a coffee:  
+🔗 `bc1qd0qatgz8h62uvnr74utwncc6j5ckfz2v2g4lef`  
+⚡️ `[email protected]`  
+💶 [Sponsor on GitHub](https://github.com/sponsors/derogab)
+
 ## License
 [_Coingraph_](https://github.com/derogab/coingraph) is made with ♥  by [derogab](https://github.com/derogab) and the [amazing dev team](https://github.com/derogab/coingraph/graphs/contributors). It is released under the MIT license.