add caching for static assets

Author: goenning

lib/miniprofiler.js

@@ -120,6 +120,7 @@ function assets(req, res, lastPathSegment, done) {
       });
 		} else {
       var rs = lastPathSegment.split('.');
+      res.setHeader('Cache-Control', 'public, max-age=31557600');
       done({
         type: contentTypes[rs[rs.length - 1]],
         status: 200,