docs: Add qucik access to render

Author: programeryk

README.md

@@ -22,6 +22,8 @@ docker compose up -d --build
 
 API: `http://localhost:3000`
 Swagger: `http://localhost:3000/api`
+Production API: `https://stateful-engagement-backend.onrender.com`
+Production Swagger: `https://stateful-engagement-backend.onrender.com/api#/`
 
 ## Using Swagger