title: I can't get env var in the Docker container
body: <p>I've ran my Docker container using this command:
  <code>docker run --name test1 -d -e FLAG='***' rastasheep/ubuntu-sshd</code>
  Now, when I connect to it via SSH, I can't get my env there via <code>printenv FLAG</code>.
  How can I fix this? When running with <code>-it</code> and <code>sh</code>, I can my get env via <code>printenv FLAG</code>.</p>