title: Define private registry in package.json
body: <p>We have a private npm repository based on <a href="https://github.com/rlidwka/sinopia" rel="noreferrer">Sinopia</a> </p>
  
  <p>What should I define in <code>package.json</code> that some packages will be installed from Synopia rather then from global npm repository? </p>
  
  <p>If I install it from command line I can run: <code>npm install &lt;package_name&gt; --registry &lt;http://&lt;server:port&gt;</code></p>
  
  <p>P.S. tried to google and looked in official NPM documentation but have found nothing.</p>