Attach footer to the bottom of the page

You can do something like this:

.site-info {
      position:fixed;
      bottom: 0;
      width: 100%;
}

Then you'll need to add some spacing to the bottom of your body tag so the footer doesn't hide stuff behind it. You'll need to find the height of your footer, and then add the following:

body {
      padding-bottom: 100px;
}

Adjust the 100px so it works with your site :)