fix CORS issue in .env.example (#2370)

* fix CORS issue in .env.example

* Fixed the IFRAME_ORIGINS

Author: Hariharan1828

docker/.env.example

@@ -6,8 +6,8 @@ LOG_PATH=/root/.flowise/logs
 BLOB_STORAGE_PATH=/root/.flowise/storage
 
 # NUMBER_OF_PROXIES= 1
-# CORS_ORIGINS="*"
-# IFRAME_ORIGINS="*"
+# CORS_ORIGINS=*
+# IFRAME_ORIGINS=*
 
 # DATABASE_TYPE=postgres
 # DATABASE_PORT=5432