Added information to enable usage on live server

aremu-smog · aremu-smog · commit 7673b7135380 · 2020-03-21T11:44:17.000+01:00
diff --git a/README.md b/README.md
@@ -118,6 +118,7 @@ PAYSTACK_SECRET_KEY=xxxxxxxxxxxxx
 PAYSTACK_PAYMENT_URL=https://api.paystack.co
 MERCHANT_EMAIL=unicodeveloper@gmail.com
 ```
+*If you are using a hosting service like heroku, ensure to add the above details to your configuration variables.*
 
 Set up routes and controller methods like so:
 
