app/views/layouts/_footer_app.erb
<footer>
<div class="inner-footer">
<p>
<a href="https://www.github.com/gorums/watchiot" target="_blank"><span class="fa fa-stack fa-lg">
<span class="fa fa-square-o fa-stack-2x"></span>
<span class="fa fa-github fa-stack-1x"></span>
</span></a>
<a href="https://twitter.com/watchiot" target="_blank">
<span class="fa fa-stack fa-lg">
<span class="fa fa-square-o fa-stack-2x"></span>
<span class="fa fa-twitter fa-stack-1x"></span>
</span>
</a>
<a href="https://www.facebook.com/watchiot" target="_blank"><span class="fa fa-stack fa-lg">
<span class="fa fa-square-o fa-stack-2x"></span>
<span class="fa fa-facebook fa-stack-1x"></span>
</span></a>
</p>
<p>© 2016 WatchIoT</p>
</div>
</footer>