title: How to use npm behing an SSL Nexus registry?
body: <p>I have installed npm on windows and tried to use it with the company Nexus. 
  To do that I created the ~/.npmrc </p>
  
  <pre><code>registry = https://mycompany/nexus/content/groups/npm-all/
  </code></pre>
  
  <p>Then, I set up npm and tried to download a library, but npm throws an error: </p>
  
  <pre><code>C:\git-repos\my-npm_module&gt;npm --loglevel info install grunt
  npm info it worked if it ends with ok
  npm info using npm@2.15.9
  npm info using node@v4.5.0
  npm WARN package.json self-service-portal@1.0.0 No README data
  npm info addNameTag [ 'grunt', 'latest' ]
  npm info attempt registry request try #1 at 09:39:42
  npm http request GET https://mycompany/nexus/content/groups/npm-all/grunt
  npm info retry will retry, error on last attempt: Error: unable to get local issuer certificate
  npm info attempt registry request try #2 at 09:39:52
  npm http request GET https://mycompany/nexus/content/groups/npm-all/grunt
  npm info retry will retry, error on last attempt: Error: unable to get local issuer certificate
  </code></pre>
  
  <p>How to use npm behing an SSL Nexus registry?</p>