title: only include file once in git repository
body: <p>I have this file. let's say <code>x</code> for this example inside folder <code>y</code>. I want to put a stub in the directory(P.S: I believe <a href="https://github.com/ciaranj/connect-auth/blob/master/examples/example_keys_file.js" rel="nofollow">this github project</a> does actually what I want to) , but only once. For this example it looks like this:</p>
  
  <pre><code>module.exports.id = "";
  module.exports.secret = "";
  module.exports.callback = "";
  </code></pre>
  
  <p>Those values should not be shared, that's why I only want to put the file(stub/empty) inside the repository once.</p>
  
  <p>When I modify <code>x</code> again, changes should not be put in the git repository, but only inside directory <code>y</code>.</p>
  
  <p>I hope I make sense and that this is also not a duplicate question. If that is the case I would love to know the stackoverflow topic which discusses this, so that I can close this topic.</p>