title: Error creating docker image: "/bin/sh: 1: -E: not found"
body: <p>I try to build image from Dockerfile, but I receive this error:</p>
  <pre><code>/bin/sh: 1: -E: not found
  The command '/bin/sh -c curl -sL https://deb.nodesource.com/setup_$NODE_VERSION.x | -E bash -' returned a non-zero code: 127.
  </code></pre>
  <p>I get it because of the following line in the Dockerfile:</p>
  <pre><code>RUN  install curl -sL https://deb.nodesource.com/setup_$NODE_VERSION.x | -E bash -
  </code></pre>