Not really a worthwhile endeavor. You'd need a different fork (the outpost's fork is not designed for disc brake forces, and adding mounting points on that fork would be ill-advised), and you'd need to have the rear frame modified.

What is is that you are trying to achieve here? You can improve braking performance a lot by installing salmon koolstop pads and making sure your brakes are et up correctly, and you "might" be able to install V brakes (assuming cantilevers not U-brakes are what the bike has now, and that the mounting distance is not too narrow) -- if you go the V-route you'll need new levers as well.