The original project is here. Since jade has been renamed to pug, jade will no longer be supported.
var template = require("pug!./file.pug");
// => returns file.pug content as template function
Try to use require
for all your embedded resources, to process them with webpack.
div
img(src=require("./my/image.png"))
You need to configure loaders for these filetypes too. (Take a look at the file-loader.)