code: function build(config) {
  	return lazypipe()
  		.pipe(() => polymerBuild(config))
  		.pipe(() => addCspCompliance())
  		.pipe(() => addCacheBusting())
  		.pipe(() => optimizeAssets())
  		.pipe(() => injectCustomElementsEs5Adapter());
  }
docs: Best practice build pipeline. This only only chains up the various build steps.
  
  @param {Object} config Content of polymer.json
  @return