Add configuration value for running in Mac

src/.env

@@ -4,7 +4,12 @@
 
 # The IP below should be swapped to your real IP or DNS name, like 192.168.88.248, etc. if testing from remote browsers or mobile devices
 
+# Use this value to run the app locally in Windows/Linux
 ESHOP_EXTERNAL_DNS_NAME_OR_IP=localhost
+
+# Use this value to run the app locally in Mac
+#ESHOP_EXTERNAL_DNS_NAME_OR_IP=docker.for.mac.localhost
+
 ESHOP_PROD_EXTERNAL_DNS_NAME_OR_IP=10.121.122.162
 
 #ESHOP_AZURE_REDIS_BASKET_DB=<YourAzureRedisBasketInfo>