title: Do the USER and WORKDIR instructions hold in downstream docker file?
body: <p>I have 2 docker images, the first Dockerfile creates a user using:</p>
  
  <pre><code>RUN useradd -m newuser
  </code></pre>
  
  <p>then it switches to the user and workspace as follows:</p>
  
  <pre><code>USER newuser
  WORKDIR /home/newuser/
  </code></pre>
  
  <p>The second docker file reads from the first image using the FROM statement.</p>
  
  <p>Should the <code>USER</code> and <code>WORKDIR</code> instructions still hold in the second file without having to put them in again?</p>