website: change CTA

website/docusaurus.config.js

@@ -25,7 +25,7 @@ module.exports = {
         src: 'img/logo.svg',
       },
       items: [
-        {to: 'introduction', label: 'Get started', position: 'left'},
+        {to: 'introduction', label: 'Start reading', position: 'left'},
         {to: 'coding', label: 'Coding', position: 'left'},
         {
           to: 'front-end-system-design',

website/src/pages/index.js

@@ -50,9 +50,12 @@ function HeroSection() {
                   styles.getStarted,
                 )}
                 href={useBaseUrl('introduction')}>
-                Get started  →
+                Start reading  →
               </a>
             </div>
+            <p className="margin-top--md">
+              <em>It's completely free!</em>
+            </p>
             <div className="margin-top--lg">
               <iframe
                 src="https://ghbtns.com/github-btn.html?user=yangshun&amp;repo=front-end-interview-handbook&amp;type=star&amp;count=true&amp;size=large"