title: Dockerfile: create ENV variable that a USER can see?
body: <p>Is there a way to set an ENV variable for a custom USER in a docker file?</p>
  
  <p>I am trying the following:</p>
  
  <pre><code>FROM some_repo/my_base_image
  ENV FOO_VAR bar_value
  USER webapp
  # ... continued (not important)
  </code></pre>
  
  <p>But my "webapp" user can not see the "FOO_VAR" variable.  HOWEVER, my root user CAN.</p>
  
  <p>Any help would be appreciated.</p>