title: No install candidate for ghostscript in node:16 docker container
body: <p>My nodejs project depends on ghostscript and imagemagick and on the build step for these dependencies I get this message:</p>
  <pre class="lang-sh prettyprint-override"><code>Step 5/7 : RUN apt-get install -y imagemagick ghostscript
   ---&gt; Running in 3c39769c2f1a
  Reading package lists...
  Building dependency tree...
  Reading state information...
  Package ghostscript is not available, but is referred to by another package.
  This may mean that the package is missing, has been obsoleted, or
  is only available from another source
  
  W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/google-chrome.list:3 and /etc/apt/sources.list.d/google.list:1
  W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/google-chrome.list:3 and /etc/apt/sources.list.d/google.list:1
  E: Package 'ghostscript' has no installation candidate
  The command '/bin/sh -c apt-get install -y imagemagick ghostscript' returned a non-zero code: 100
  </code></pre>
  <p>This step does not fail on an ubuntu container but i'm trying not to use that because i'm having issues with the nodejs package from apt-get<br />
  It's my understanding that apt-get looks through all the repositories it knows about to find an install candidate. So if in the node:16 image it doesn't know where to find ghostscript I need to add it to my list of apt repositories? If that is so, how would I go about doing that and how would I find which apt repository I need to add?</p>