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http://codepen.io/VilJam/pen/tEajd

  
  <h1>Sticky Footer</h1>
  <h2>with Fixed Footer Height</h2>
  
  <button id="add">Add Content</button>  
     

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<% if user_signed_in? %>

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http://mattmazur.com/2012/01/18/how-to-switch-your-cedar-heroku-app-from-webrick-to-thin/

Add gem 'thin' to your Gemfile:
Bundle install
Add a Procfile to your root directory to instruct Heroku to use Thin instead of Webrick:

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Sendgrid

$ heroku addons:add sendgrid:starter
$ heroku config:get SENDGRID_USERNAME

In config/environment.rb

ActionMailer::Base.smtp_settings = {
 :address        => 'smtp.sendgrid.net',
 :port => '587',

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<li class="<%= controller_name == 'pages' && action_name == 'about' ? 'active' : '' %>">
            <%= link_to("About", about_path) %>
          </li>

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Gemfile and bundle install

gem 'devise'

Install devise

$ rails generate devise:install

app/views/layouts/application.html.erb

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$ rails generate scaffold pins description:string

followed by

$ rake db:migrate

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"file_" + i.to_s.rjust(n, "0")

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In your controller

before_filter :authenticate_user!, :only => [:display]

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  <%= link_to "<span class='fa fa-plus'></span> New Waybill</button>".html_safe, new_waybill_path, :class => "btn-u btn-red", :style => "float: right" %>