title: How to clone and run another user's Rails app
body: <p>I'm attempting to do something I've never done before: clone another user's (codeforamerica) repository and run it locally on my computer with the intention of making my own changes to it.</p>
  
  <p>I've managed to fork it to my own repositories, and cloned it:</p>
  
  <pre><code>git clone https://github.com/martynbiz/human_services_finder.git
  </code></pre>
  
  <p>...but when I do the following straight out the box:</p>
  
  <pre><code>cd human_services_finder
  rails s
  </code></pre>
  
  <p>...it tell me:</p>
  
  <pre><code>The program 'rails' is currently not installed.  You can install it by typing:
  sudo apt-get install rails
  </code></pre>
  
  <p>...however, if I go into one of my own apps and run <code>rails s</code> it runs the server OK. Is there something missing I need to run this as a Rails app? Sorry, bit of a beginner with this one. Thanks</p>