Update README.md to include maintainers and core contributors

Signed-off-by: Adeyinka Oresanya <adeyinkaoresanya@gmail.com>

Author: adeyinkaoresanya

README.md

@@ -1,3 +1,14 @@
 # Project Badging Backend
 
 Server side development of the DEI Project Badging focusing on scripting, databases, back-end logic, & APIs
+
+## Contributors
+
+**Maintainers**
+- [Adeyinka Oresanya](https://github.com/adeyinkaoresanya)
+- [Desmond Obisi](https://github.com/desmondsanctity)
+
+**Core Contributors**
+
+- [Enock Kasaadha](https://github.com/kaxada)
+