title: Why can't webpack find any module from my React Webapp?
body: <p>I want to run webpack on ubuntu to run my react webapp. When running <em>webpack</em> from the command line, I get the following error (just a small extraction of all the errors that I get):</p>
  
  <blockquote>
    <p>ERROR in Cannot find module 'loader-utils'  @
    ./src/components/WaitingMsg.styl 4:14-129 13:2-17:4 14:20-135</p>
    
    <p>ERROR in Cannot find module 'loader-utils'  @
    ./src/components/CreateBox.styl 4:14-128 13:2-17:4 14:20-134</p>
    
    <p>ERROR in Cannot find module 'loader-utils'  @
    ./src/components/Trashbin.styl 4:14-127 13:2-17:4 14:20-133</p>
    
    <p>...</p>
    
    <p>ERROR in ./src/components/Minimap.jsx Module not found: Error: Cannot
    resolve 'file' or 'directory' ./minimap.styl in
    /var/www/WebApp/webapp_client/src/components  @
    ./src/components/Minimap.jsx 23:0-25</p>
    
    <p>ERROR in Cannot find module 'loader-utils'  @
    ./src/components/IdeaNode.styl 4:14-127 13:2-17:4 14:20-133</p>
    
    <p>ERROR in ./~/react-dnd/lib/DragLayer.js Module not found: Error:
    Cannot resolve module 'invariant' in
    /var/www/WebApp/webapp_client/node_modules/react-dnd/lib  @
    ./~/react-dnd/lib/DragLayer.js 35:17-37
    ...</p>
    
    <p>ERROR in ./~/socket.io-client/lib/manager.js Module not found: Error:
    Cannot resolve module 'backo2' in
    /var/www/WebApp/webapp_client/node_modules/socket.io-client/lib  @
    ./~/socket.io-client/lib/manager.js 16:14-31</p>
    
    <p>...</p>
    
    <p>ERROR in ./~/react-dnd/lib/bindConnectorMethod.js Module not found:
    Error: Cannot resolve module 'disposables' in
    /var/www/WebApp/webapp_client/node_modules/react-dnd/lib  @
    ./~/react-dnd/lib/bindConnectorMethod.js 16:19-41</p>
    
    <p>ERROR in ./~/react-dnd/lib/utils/cloneWithRef.js Module not found:
    Error: Cannot resolve module 'invariant' in
    /var/www/WebApp/webapp_client/node_modules/react-dnd/lib/utils  @
    ./~/react-dnd/lib/utils/cloneWithRef.js 8:17-37</p>
  </blockquote>
  
  <p>I run this on Ubuntu 14.04. What am I doing wrong here? Am I missing any packages?</p>