update index.html

docs/index.html

@@ -48,6 +48,8 @@
                 <!--Bars, Lines or <a href="http://www.storytellingwithdata.com/blog/2011/07/death-to-pie-charts" target="_blank">Percentages</a>-->
                 Create a chart
               </h6>
+              <p class="step-explain">Install</p>
+              <pre><code class="hljs html">  npm install frappe-charts</code></pre>
               <p class="step-explain">Include it in your HTML</p>
               <pre><code class="hljs html">  &lt;script src="frappe-charts.min.js" /&gt;</code></pre>
               <p class="step-explain">Make a new Chart</p>