title: Package 'chromium-browser' has no installation candidate
body: <p>I am trying to install the <code>chrome</code> browser in a <code>docker</code> image with </p>
  
  <pre><code>RUN apt-get install chromium-browser
  </code></pre>
  
  <p>but I get the error: </p>
  
  <pre><code>Package chromium-browser 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
  
  E: Package 'chromium-browser' has no installation candidate
  </code></pre>
  
  <p>How to correctly install <code>chromium</code> in a <code>docker</code> image?</p>