title: ADD Command for Docker Toolbox on Mac
body: <p>I have Docker Toolbox installed on my Mac, but I'm having issues adding a file to a container during build. I'm using the ADD command in the Dockerfile. I can't seem to add any local files. I understand that Docker Toolbox uses VirtualBox under the hood, but I am not sure how to get those files into the VM to build the container. Is there a way I can do it that allows me to keep a clean OS-agnostic Dockerfile without any absolute paths?</p>
  
  <p>Here is my Dockerfile. It's built from the Node.js container with some additional dependencies.</p>
  
  <pre><code>FROM node:4.2.2
  
  RUN apt-get update
  RUN apt-get install -y libvips-dev libgsf-1-dev libkrb5-dev
  RUN apt-get clean
  
  ADD app/ /app
  RUN cd /app &amp;&amp; npm install --production
  RUN npm install forever -g
  </code></pre>