title: failed to update store for object type *libnetwork.endpointCnt: Key not found in store
body: <p>I had this error while building the created docker file. It happens at the stage of creating the work-directory(WORKDIR)</p>
  
  <p>i did tried to restart the docker service , but it doesnot help me either!</p>
  
  <pre><code>FROM ubuntu:16.04
  
  RUN mkdir /app
  
  WORKDIR /app
  
  FROM python:3.5
  
  RUN pip install -r app/requirements.txt
  
  ADD . /app
  
  CMD["python","app/hello.py"]
  </code></pre>