Merge pull request #470 from edx/jarv/add-cdn-var

adding var for STATIC_URL

playbooks/roles/edxapp/defaults/main.yml

@@ -105,7 +105,10 @@ EDXAPP_BULK_EMAIL_DEFAULT_FROM_EMAIL: ''
 EDXAPP_ENV_EXTRA: {}
 EDXAPP_AUTH_EXTRA: {}
 EDXAPP_MKTG_URL_LINK_MAP: {}
-
+# Set this sets the url for static files
+# Override this var to use a CDN
+# Example: xxxxx.cloudfront.net/static/
+EDXAPP_STATIC_URL: "/static/"
 
 #-------- Everything below this line is internal to the role ------------
 
@@ -259,6 +262,7 @@ edxapp_generic_auth_config:  &edxapp_generic_auth
   CELERY_BROKER_PASSWORD: $EDXAPP_CELERY_PASSWORD
 
 generic_env_config:  &edxapp_generic_env
+  STATIC_URL: $EDXAPP_STATIC_URL
   STATIC_ROOT_BASE: $edxapp_staticfile_dir
   LMS_BASE: $EDXAPP_LMS_BASE
   CMS_BASE: $EDXAPP_CMS_BASE