title: Snap Proxy doesn´t work
body: <p>I try to install <strong>Conjure-Up</strong> on my Ubuntu 18.04 virtual machine with</p>
  
  <pre><code>$sudo snap install conjure-up --classic
  </code></pre>
  
  <p>But it always says:</p>
  
  <blockquote>
    <p>error: cannot install "conjure-up": Post <a href="https://api.snapcraft.io/v2/snaps/refresh" rel="noreferrer">https://api.snapcraft.io/v2/snaps/refresh</a>: proxyconnect
               tcp: EOF</p>
  </blockquote>
  
  <p>I have successfully set up my <em>http</em> and <em>https proxy</em> in <code>/etc/environments</code></p>
  
  <p>need help.</p>