title: Running Docker on Mac, build works, run errors: : /bin/sh: 1: [: missing ]
body: <p>Running Docker on Mac, I can build my image, but on running, I get the following error: </p>
  
  <pre><code>/bin/sh: 1: [: missing ]
  </code></pre>
  
  <p>I create the image in a local directory with 
  a dockerfile, requirements.txt and a python script file. - 3 files-
   using docker build </p>
  
  <p>Dockerfile: </p>
  
  <pre><code>FROM python
  COPY "requirements.txt"
  RUN pip install -r requirements.txt
  COPY "quandlData.py"
  CMD [ "python", "./quandlData.py" 
  </code></pre>
  
  <p>-simple script that gets some data from quandl API and writes-gets from a redis server- which is running. To run, I just use <code>docker run image_name</code></p>