title: Docker Returned a non-zero code 100
body: <p>I am trying to build a docker file and it keeps returning a non-zero code 100 for this part. Any ideas why?</p>
  
  <pre><code>FROM php:7.1-fpm
  
  RUN apt-get update &amp;&amp; apt-get install -y libmcrypt-dev \
      mysql-client libmagickwand-dev --no-install-recommends \
      &amp;&amp; pecl install imagick \
      &amp;&amp; docker-php-ext-enable imagick \
      &amp;&amp; docker-php-ext-install mcrypt pdo_mysql zip
  </code></pre>