A simple way is to use express-dot:
npm install express-dot
and in your app.js:
var doT = require('express-dot');
// (optional) set globals any thing you want to be exposed by this in {{= }} and in def {{# }}
doT.setGlobals({ ... });
app.set('view engine', 'dot' );
app.engine('dot', doT.__express );
Of cause, it is suggested that compose your own as generalhenry said.
Becase if you do that , you will understand express and dot better.
express-dot do not support pre-compile, so I have a simple pre-compile example in my Github repo.
Good luck.