jQuery File Upload action=server/php

I was trying to get to work a [JQuery File Uploader][1] but I ran into difficulties.
I have copied and pasted all files and folders they have got their into my rails project folder.
But the "Add files"-Button doesnt work. I can select the files but nothing happens afterwords.
I have studied the code and found :

    <!-- The file upload form used as target for the file upload widget -->
        <form id="fileupload" action="server/php/" method="POST" enctype="multipart/form-data">
            <!-- The fileupload-buttonbar contains buttons to add/delete files and start/cancel the upload -->

An action called "action="server/php". They dont have controllers with such an action, one what they have with such name is a folder [/server/php][2].So the action correspons to a folder. I donwloaded it as well and placed in my rails project. I dont want to upload everything to a server, I want to look first if it worls with simplier "rails s". But I have no idea how I can link

    action="server/php"

in

    <form id="fileupload" action="server/php/" method="POST" enctype="multipart/form-data">
to my server/php folder.

  [1]: https://github.com/blueimp/jQuery-File-Upload
  [2]: https://github.com/blueimp/jQuery-File- … server/php

I would be really grateful if somebody helps me to deal with it.