added Netlify deploy badge

Author: kalwalt

_includes/footer.html

@@ -14,6 +14,10 @@
         {% endif %}
         <div class="content is-small has-text-centered" >
           <p> Our website is hosted on <a href="https://www.netlify.com/">Netlify.com</a></p>
+
+          <a href="https://www.netlify.com">
+            <img src="https://www.netlify.com/img/global/badges/netlify-color-bg.svg" alt="Deploys by Netlify" />
+          </a>
         </div>
 
         <div class="content is-small has-text-centered">