Applied first batch of suggestions from Mario

src/index.html.njk

@@ -255,7 +255,7 @@ og_type:
           </div>
           <div class="columns is-variable is-6">
             <div class="column is-one-third">
-              <h4 class="subtitle is-4 is-green">Reach a 360° knowledge of the Node.js ecosystem</h4>
+              <h4 class="subtitle is-4 is-green">Get a 360° knowledge of the Node.js ecosystem</h4>
               <p>660 pages packed with deep knowledge of Node.js from a theoretical and practical point of view, to become a Node.js pro and apply what you discover to real-world projects.</p>
             </div>
 
@@ -266,7 +266,7 @@ og_type:
 
             <div class="column is-one-third">
               <h4 class="subtitle is-4 is-green">Join a thriving Node.js dev community</h4>
-              <p>Enter a prolific and active community on GitHub, where other developers who are reading the book share ideas, comments, and correct exercises together.</p>
+              <p>Gain access to an active community on GitHub, where other developers who are reading the book share ideas, comments, and correct exercises together.</p>
             </div>
           </div>
         </div>
@@ -308,7 +308,7 @@ og_type:
                 {% responsiveImage './img/mario-casciaro.jpg', "Mario Casciaro's picture", {class: 'avatar', maxWidth: 300}  %}
               </div>
               <div class="column is-two-third">
-                <p>Mario is a software engineer and entrepreneur who worked at IBM for a number of years. He currently splits his time between Var7 Technologies (his own software company) and its role as CTO at D4H Technologies where he creates software for emergency response teams.</p>
+                <p>Mario is currently the CTO of D4H Technologies, where he creates software for emergency management. In the past, Mario has worked at IBM as a team lead and also founded a couple of software companies.</p>
                 <ul>
                   <li>
                     <a title="Visit Mario's blog" target="_blank" rel="me noopener" href="https://mario.fyi/">Blog</a>