Created rake task to save rate

Rakefile

@@ -1,3 +1,6 @@
 require 'sinatra/activerecord'
 require 'sinatra/activerecord/rake'
+require './models/rate'
 require './app'
+
+Dir.glob('lib/tasks/*.rake').each { |r| load r}

lib/tasks/cron.rake

@@ -0,0 +1,6 @@
+namespace :rate do
+  desc "create and save rate"
+  task :save do
+    Rate.save
+  end
+end