title: "No Procfile detected" in Sinatra app heroku push
body: <p>I am new with Sinatra and heroku. I am trying to push a small Sinatra app to heroku and I am getting this error, </p>
  
  <pre><code> Bundle completed (24.34s)
     Cleaning up the bundler cache.
  -----&gt; WARNINGS:
         No Procfile detected, using the default web server (webrick)
         ##I have gone over the docs a few times and added unicorn 
         https://devcenter.heroku.com/articles/ruby-default-web-server
  -----&gt; Discovering process types
         Procfile declares types -&gt; (none)
         Default types for Ruby  -&gt; console, rake, web
  
  -----&gt; Compressing... done, 17.5MB
  -----&gt; Launching... done, v8
  </code></pre>
  
  <p>This is what my gem file looks like</p>
  
  <pre><code>   source 'https://rubygems.org'
     ruby '2.1.1'
     gem 'sinatra'
     gem 'sinatra-contrib'
     gem 'typhoeus'
     gem 'pry'
     gem 'rspec'
     gem 'pg'
     gem 'unicorn'
     gem 'thin', '1.2.7'
  </code></pre>
  
  <p>I have tried  many things that I have seen online and This error still appears. Sorry if this is a silly question But its driving me nuts! If you would like to see anymore files in the app I will happily add them, I am just not to sure what ones to add.. </p>
  
  <p>Thank you for your time and I appreciate your help.  </p>