Don't require SCRIVITO_WORKSPACE to boot

Author: yasulab

app/controllers/cms_controller.rb

@@ -2,6 +2,9 @@
 class CmsController < ApplicationController
   include Scrivito::ControllerActions
 
-  Scrivito::Workspace.use(ENV["SCRIVITO_WORKSPACE"])
+  title ||= ENV['SCRIVITO_WORKSPACE'] || 'DEFAULT_WORKSPACE'
+  Scrivito::Workspace.create(title: title) unless Scrivito::Workspace.find_by_title(title)
+  Scrivito::Workspace.use(title)
+
   LoginPage.create(title: 'ログイン')
 end