title: Is it possible to show the `WORKDIR` when building a docker image?
body: <p>We have a problem with the <code>WORKDIR</code> when we building a docker image. Is it possible to print the value of <code>WORKDIR</code>?</p>
  
  <p>We tried:</p>
  
  <pre><code>ECHO ${WORKDIR}
  </code></pre>
  
  <p>But there is no such instruction <code>ECHO</code></p>