PLEASE DON'T USE THIS: Well, you can. I'm sure it still works fine but it was built before Webpack 2 was a thing and is wholly unmaintained. (i.e. use Webpack)
A flexible frontend compiler.
yarn global add gulp lapis-compiler
npm install --save -g gulp lapis-compiler
lapis
cd node_modules/lapis-compiler
gulp --silent
yarn upgrade lapis-compiler
npm update -g lapis-compiler
npm update lapis-compiler
npm rebuild