app/views/layouts/application.html.haml
!!!
%html
%head
%title HelloMonument
= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track' => true
= javascript_include_tag 'application', 'data-turbolinks-track' => true
= csrf_meta_tags
%body
.container
.col-md-12
= render 'layouts/flash'
= render 'layouts/main_menu'
= yield