quick-start.md in ufo-2.1.0

- old
+ new

@@ -6,17 +6,17 @@
 
 ```sh
 gem install ufo
 git clone https:///github.com/tongueroo/hi.git
 cd hi
-ufo init --app=hi --env prod --cluster=prod --image=tongueroo/hi
+ufo init --app=hi --image=tongueroo/hi
 ufo ship hi-web
 ```
 
 You should see something similar to this:
 
 ```
-$ ufo init --app=hi --env prod --cluster=prod --image=tongueroo/hi
+$ ufo init --app=hi --image=tongueroo/hi
 Setting up ufo project...
 created: ./bin/deploy
 created: ./Dockerfile
 created: ./ufo/settings.yml
 created: ./ufo/task_definitions.rb