Added DOCKER config

Author: jbrooksuk

conf/.env.docker

@@ -9,6 +9,8 @@ DB_DATABASE="{{DB_DATABASE}}"
 DB_USERNAME="{{DB_USERNAME}}"
 DB_PASSWORD="{{DB_PASSWORD}}"
 
+DOCKER=true
+
 CACHE_DRIVER="{{CACHE_DRIVER}}"
 SESSION_DRIVER="{{SESSION_DRIVER}}"
 QUEUE_DRIVER="{{QUEUE_DRIVER}}"