code: function(file, done){
        var ext = path.extname(file);
        if(!ssr.helpers.shouldIgnore(file) && ['.jade', '.ejs', '.md', '.styl', '.less', '.scss', '.sass', '.coffee', 'pug'].indexOf(ext) === -1){
          var localPath = path.resolve(outputPath, file);
          fs.mkdirp(path.dirname(localPath), function(err){
            fs.copy(path.resolve(setup.publicPath, file), localPath, done);
          });
        }else{
          done();
        }
      }
docs: Copy File
  
  TODO: reference ignore extensions from a ssr helper.