title: Multiline comments in Dockerfiles
body: <p>Is there a fast way to comment out multiple lines in a Dockerfile?</p>
  
  <p>I know that I can add <code>#</code> at the beginning of each line. But if there are many lines this is too much work. In some languages there are multiline comments such as <code>/* ... */</code>, which makes commenting out large parts of a file very fast.</p>