Added Config cache doc for production

Author: Codexshaper

README.md

@@ -20,7 +20,12 @@ WOOCOMMERCE_STORE_URL=YOUR_WEBSITE_URL
 WOOCOMMERCE_CONSUMER_KEY=API_CONSUMER_KEY
 WOOCOMMERCE_CONSUMER_SECRET=API_CONSUMER_SECRET
 ```
-#Do you need any help to create your own API credentials? Read the officials Doc https://docs.woocommerce.com/document/woocommerce-rest-api/
+### Do you need any help to create your own API credentials? Read the [WooCommerce Officials Doc](https://docs.woocommerce.com/document/woocommerce-rest-api/)
+### If you face any error after change the .env file in `production` then run below command
+
+`php artisan config:cache`
+
+For more details about config cache follow the [Laravel Official Doc](https://laravel.com/docs/6.x/configuration#configuration-caching)
 
 # Example for Product