title: Docker build hangs during downloads
body: <p>Mac 10.10.5 here, using <code>docker-machine</code> to create a VirtualBox host VM for my local Docker. I have a project that builds an executable JVM located at <code>build/libs/myapp-SNAPSHOT.jar</code>. My <code>Dockerfile</code>, which is located in the root of the project, looks like:</p>
  
  <pre><code>FROM frolvlad/alpine-oraclejdk8:slim
  VOLUME /tmp
  ADD build/libs/myapp-SNAPSHOT.jar myapp.jar
  RUN sh -c 'touch /myapp.jar'
  ENTRYPOINT ["java","-jar","/myapp.jar"]
  </code></pre>
  
  <p>Please note, I don't wish to <em>push</em> my images to any registry, just keep/run them locally (for now). When I run:</p>
  
  <pre><code>docker build -t myorg/myapp .
  </code></pre>
  
  <p>I get the following console output:</p>
  
  <pre><code>myuser@mymachine:~/sandbox/myapp$docker build -t myorg/myapp .
  Sending build context to Docker daemon 42.69 MB
  Step 1 : FROM frolvlad/alpine-oraclejdk8:slim
  slim: Pulling from frolvlad/alpine-oraclejdk8
  
  d0ca440e8637: Downloading [=================================================&gt; ] 2.295 MB/2.32 MB
  0f86278f6be1: Downloading [=================================================&gt; ] 3.149 MB/3.172 MB
  c704a6161dca: Download complete 
  </code></pre>
  
  <p>And then the command-line just hangs after printing that "<em>Download complete</em>" message. I've waited for as long as 30 minutes (!!!) and nothing happens.</p>
  
  <p>Any ideas where I'm going awry?</p>