title: Dockerfile build - possible to ignore error?
body: <p>I've got a Dockerfile. When building the image, the build fails on this error:</p>
  
  <pre><code>automake: error: no 'Makefile.am' found for any configure output
  Error build: The command [/bin/sh -c aclocal &amp;&amp; autoconf &amp;&amp; automake -a] returned a non-zero code: 1
  </code></pre>
  
  <p>which in reality is harmless. The library builds fine, but Docker stops the build once it receives this error. Is there any way I can instruct Docker to just ignore this?</p>