title: Unable to locate file in docker container
body: <p>I'm new to docker and creating a simple test app to test my docker container, but docker unable to locate the <code>server.py</code> file.</p>
  
  <p>The directory structure of my project is:</p>
  
  <pre><code>&lt;project&gt;
  |
  |-- Dockerfile
  |-- app
        |
        |-- requirements.txt
        |-- server.py
  </code></pre>
  
  <p>Below is the <code>Dockerfile</code> content:</p>
  
  <pre><code>FROM ubuntu:latest
  
  MAINTAINER name &lt;mail@domain.com&gt;
  
  COPY . /app  # do I need this ?
  COPY ./app/requirements.txt /tmp/requirements.txt
  
  RUN apt-get -y update &amp;&amp; \
  apt-get install -y python-pip python-dev build-essential
  RUN pip install -r /tmp/requirements.txt
  
  WORKDIR /app
  RUN chmod +x server.py    # ERROR: No such file or directory
  
  EXPOSE 5000
  
  ENTRYPOINT ["python"]
  CMD ["server.py"]    # ERROR: No such file or directory
  </code></pre>
  
  <p>I'm using boot2docker on windows.</p>
  
  <p>What am I missing here?</p>