#posts_controller.rb
class PostsController < ApplicationController
  def index
    @post = Post.limit(5)
  end
end

#_post.html.erb located app/views/posts
<div class="col-sm-3 single-post-card" id=<%= post_path(post.id) %>>
  <div class="card">
    <div class="card-block">
      <h4 class="post-text">
        <%= truncate(post.title, :length => 60) %>
      </h4>
      <div class="post-content">
        <div class="posted-by">Posted by <%= post.user.name %></div>
        <h3><%= post.title %></h3>
        <p><%= post.content %></p>
        <%= link_to "I'm interested", post_path(post.id), class: 'interested' %>
      </div>
    </div>
  </div><!-- card -->
</div><!-- col-sm-3 -->

#pages_controller.rb
class PagesController < ApplicationController
  def index
  end
end

#index.html.erb located app/views/pages/
<div class="container-fluid">
  <div class="row">

    <div class="col-sm-3" id="side-menu">
    </div><!-- side menu -->

    <div class="col-sm-9" id="main-content">
    </div><!-- main content -->

  </div><!-- row -->
</div>

#routes.rb
Rails.application.routes.draw do
  devise_for :users,
    :controllers => {:registrations => "registrations"},
    path: '',
    path_names: {
      sign_in: 'login',
      sign_out: 'logout',
      password: 'secret',
      sign_up: 'register'
    }

  resources :posts do
    collection do
      get 'hobby'
      get 'study'
      get 'team'
    end
  end

  root to: 'pages#index'
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end