title: Docker image silently fails to start
body: <p>The following docker image successfully builds but will just not run - without any (visible) error:</p>
  <pre><code>FROM alpine:3
  
  RUN apk --no-cache add transmission-cli transmission-daemon \
      &amp;&amp; mkdir -p /transmission/config \
      &amp;&amp; chmod -R 777 /transmission 
  
  RUN apk add --no-cache --upgrade bash
  RUN wget -P ./transmission/ https://speed.hetzner.de/100MB.bin
  
  ENV TRACKER_URL=&quot;http://104.219.73.18:6969/announce&quot;
  RUN echo tracker url is: ${TRACKER_URL}
  RUN transmission-create -t ${TRACKER_URL} -o ./transmission/testfile.torrent /transmission/100MB.bin
  
  CMD transmission-daemon -c ./transmission --config-dir ./transmission/
  </code></pre>
  <p>The <code>logs</code> show nothing for me. What's strange: If I build the image, run a shell inside it and execute the <code>CMD</code>, everything runs just fine. I've already tried wrapping the <code>CMD</code> in a bash script and executed that (because why not), but with the same result.</p>
  <p>What am I missing?</p>