app/views/layouts/application.html.haml
!!!
%html
%head
%title KnowledgeBase
= stylesheet_link_tag "application", media: "all"
= javascript_include_tag "application"
%meta{content: "width=device-width, initial-scale=1.0", name: "viewport"}
= csrf_meta_tags
%body
= render 'layouts/header'
.row.container
= yield
= yield :extra_files